diff --git a/baselines/audioworklet.generated.d.ts b/baselines/audioworklet.generated.d.ts
index 1002c57b0..a01db288e 100644
--- a/baselines/audioworklet.generated.d.ts
+++ b/baselines/audioworklet.generated.d.ts
@@ -1396,7 +1396,7 @@ interface URLSearchParams {
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    new(init?: string | Iterable<[string, string]> | Record<string, string>): URLSearchParams;
 };
 
 /**
diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index 31ae9872c..53b3c8455 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -33187,7 +33187,7 @@ interface URLSearchParams {
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    new(init?: string | Iterable<[string, string]> | Record<string, string>): URLSearchParams;
 };
 
 /**
diff --git a/baselines/serviceworker.generated.d.ts b/baselines/serviceworker.generated.d.ts
index 6430a4b66..0f9cb029b 100644
--- a/baselines/serviceworker.generated.d.ts
+++ b/baselines/serviceworker.generated.d.ts
@@ -7794,7 +7794,7 @@ interface URLSearchParams {
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    new(init?: string | Iterable<[string, string]> | Record<string, string>): URLSearchParams;
 };
 
 /**
diff --git a/baselines/sharedworker.generated.d.ts b/baselines/sharedworker.generated.d.ts
index 6ce6e8fb6..51ac35005 100644
--- a/baselines/sharedworker.generated.d.ts
+++ b/baselines/sharedworker.generated.d.ts
@@ -7337,7 +7337,7 @@ interface URLSearchParams {
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    new(init?: string | Iterable<[string, string]> | Record<string, string>): URLSearchParams;
 };
 
 /**
diff --git a/baselines/ts5.5/audioworklet.generated.d.ts b/baselines/ts5.5/audioworklet.generated.d.ts
index 9b946e70a..3e70659b6 100644
--- a/baselines/ts5.5/audioworklet.generated.d.ts
+++ b/baselines/ts5.5/audioworklet.generated.d.ts
@@ -1396,7 +1396,7 @@ interface URLSearchParams {
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    new(init?: string | Iterable<[string, string]> | Record<string, string>): URLSearchParams;
 };
 
 /**
diff --git a/baselines/ts5.5/dom.generated.d.ts b/baselines/ts5.5/dom.generated.d.ts
index 5fc97c13e..8791da2bd 100644
--- a/baselines/ts5.5/dom.generated.d.ts
+++ b/baselines/ts5.5/dom.generated.d.ts
@@ -33164,7 +33164,7 @@ interface URLSearchParams {
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    new(init?: string | Iterable<[string, string]> | Record<string, string>): URLSearchParams;
 };
 
 /**
diff --git a/baselines/ts5.5/serviceworker.generated.d.ts b/baselines/ts5.5/serviceworker.generated.d.ts
index 6847b2bec..5bc5898a4 100644
--- a/baselines/ts5.5/serviceworker.generated.d.ts
+++ b/baselines/ts5.5/serviceworker.generated.d.ts
@@ -7794,7 +7794,7 @@ interface URLSearchParams {
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    new(init?: string | Iterable<[string, string]> | Record<string, string>): URLSearchParams;
 };
 
 /**
diff --git a/baselines/ts5.5/sharedworker.generated.d.ts b/baselines/ts5.5/sharedworker.generated.d.ts
index de00fa37c..14949118e 100644
--- a/baselines/ts5.5/sharedworker.generated.d.ts
+++ b/baselines/ts5.5/sharedworker.generated.d.ts
@@ -7337,7 +7337,7 @@ interface URLSearchParams {
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    new(init?: string | Iterable<[string, string]> | Record<string, string>): URLSearchParams;
 };
 
 /**
diff --git a/baselines/ts5.5/webworker.generated.d.ts b/baselines/ts5.5/webworker.generated.d.ts
index cdaec1532..7967b5460 100644
--- a/baselines/ts5.5/webworker.generated.d.ts
+++ b/baselines/ts5.5/webworker.generated.d.ts
@@ -8943,7 +8943,7 @@ interface URLSearchParams {
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    new(init?: string | Iterable<[string, string]> | Record<string, string>): URLSearchParams;
 };
 
 /**
diff --git a/baselines/ts5.6/audioworklet.generated.d.ts b/baselines/ts5.6/audioworklet.generated.d.ts
index 9b946e70a..3e70659b6 100644
--- a/baselines/ts5.6/audioworklet.generated.d.ts
+++ b/baselines/ts5.6/audioworklet.generated.d.ts
@@ -1396,7 +1396,7 @@ interface URLSearchParams {
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    new(init?: string | Iterable<[string, string]> | Record<string, string>): URLSearchParams;
 };
 
 /**
diff --git a/baselines/ts5.6/dom.generated.d.ts b/baselines/ts5.6/dom.generated.d.ts
index 7412dce9d..f65edf5b5 100644
--- a/baselines/ts5.6/dom.generated.d.ts
+++ b/baselines/ts5.6/dom.generated.d.ts
@@ -33187,7 +33187,7 @@ interface URLSearchParams {
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    new(init?: string | Iterable<[string, string]> | Record<string, string>): URLSearchParams;
 };
 
 /**
diff --git a/baselines/ts5.6/serviceworker.generated.d.ts b/baselines/ts5.6/serviceworker.generated.d.ts
index 6847b2bec..5bc5898a4 100644
--- a/baselines/ts5.6/serviceworker.generated.d.ts
+++ b/baselines/ts5.6/serviceworker.generated.d.ts
@@ -7794,7 +7794,7 @@ interface URLSearchParams {
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    new(init?: string | Iterable<[string, string]> | Record<string, string>): URLSearchParams;
 };
 
 /**
diff --git a/baselines/ts5.6/sharedworker.generated.d.ts b/baselines/ts5.6/sharedworker.generated.d.ts
index de00fa37c..14949118e 100644
--- a/baselines/ts5.6/sharedworker.generated.d.ts
+++ b/baselines/ts5.6/sharedworker.generated.d.ts
@@ -7337,7 +7337,7 @@ interface URLSearchParams {
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    new(init?: string | Iterable<[string, string]> | Record<string, string>): URLSearchParams;
 };
 
 /**
diff --git a/baselines/ts5.6/webworker.generated.d.ts b/baselines/ts5.6/webworker.generated.d.ts
index cdaec1532..7967b5460 100644
--- a/baselines/ts5.6/webworker.generated.d.ts
+++ b/baselines/ts5.6/webworker.generated.d.ts
@@ -8943,7 +8943,7 @@ interface URLSearchParams {
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    new(init?: string | Iterable<[string, string]> | Record<string, string>): URLSearchParams;
 };
 
 /**
diff --git a/baselines/webworker.generated.d.ts b/baselines/webworker.generated.d.ts
index 800f6b628..a03d40918 100644
--- a/baselines/webworker.generated.d.ts
+++ b/baselines/webworker.generated.d.ts
@@ -8943,7 +8943,7 @@ interface URLSearchParams {
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    new(init?: string | Iterable<[string, string]> | Record<string, string>): URLSearchParams;
 };
 
 /**
diff --git a/inputfiles/addedTypes.jsonc b/inputfiles/addedTypes.jsonc
index fbc48d8dd..d22c336bd 100644
--- a/inputfiles/addedTypes.jsonc
+++ b/inputfiles/addedTypes.jsonc
@@ -647,21 +647,6 @@
                     ]
                 }
             },
-            "URLSearchParams": {
-                "name": "URLSearchParams",
-                "constructor": {
-                    "signature": {
-                        "0": {
-                            "param": [
-                                {
-                                    "name": "init",
-                                    "additionalTypes": ["URLSearchParams"]
-                                }
-                            ]
-                        }
-                    }
-                }
-            },
             "NodeListOf": {
                 "name": "NodeListOf",
                 "typeParameters": [
diff --git a/inputfiles/overridingTypes.jsonc b/inputfiles/overridingTypes.jsonc
index f8acee220..5a8575139 100644
--- a/inputfiles/overridingTypes.jsonc
+++ b/inputfiles/overridingTypes.jsonc
@@ -3842,7 +3842,22 @@
                         }
                     }
                 }
-            }
+            },
+			"URLSearchParams": {
+				"name": "URLSearchParams",
+				"constructor": {
+					"signature": {
+						"0": {
+							"param": [
+								{
+									"name": "init",
+									"overrideType": "string | Iterable<[string, string]> | Record<string, string>"
+								}
+							]
+						}
+					}
+				}
+			}
         }
     },
     "dictionaries": {