diff --git a/src/EFCore.PG.NodaTime/Query/Internal/NpgsqlNodaTimeMethodCallTranslatorPlugin.cs b/src/EFCore.PG.NodaTime/Query/Internal/NpgsqlNodaTimeMethodCallTranslatorPlugin.cs
index c918467e3..68c53d5d5 100644
--- a/src/EFCore.PG.NodaTime/Query/Internal/NpgsqlNodaTimeMethodCallTranslatorPlugin.cs
+++ b/src/EFCore.PG.NodaTime/Query/Internal/NpgsqlNodaTimeMethodCallTranslatorPlugin.cs
@@ -72,6 +72,8 @@ public class NpgsqlNodaTimeMethodCallTranslator : IMethodCallTranslator
     private static readonly MethodInfo LocalDateTime_Distance =
         typeof(NpgsqlNodaTimeDbFunctionsExtensions).GetRuntimeMethod(
             nameof(NpgsqlNodaTimeDbFunctionsExtensions.Distance), new[] { typeof(DbFunctions), typeof(LocalDateTime), typeof(LocalDateTime) })!;
+    private static readonly MethodInfo LocalDateTime_ToDateTimeUnspecified =
+        typeof(LocalDateTime).GetRuntimeMethod(nameof(LocalDateTime.ToDateTimeUnspecified), Type.EmptyTypes)!;
 
     private static readonly MethodInfo LocalDate_Distance =
         typeof(NpgsqlNodaTimeDbFunctionsExtensions).GetRuntimeMethod(
@@ -253,6 +255,14 @@ public NpgsqlNodaTimeMethodCallTranslator(
             return _sqlExpressionFactory.MakePostgresBinary(PostgresExpressionType.Distance, arguments[1], arguments[2]);
         }
 
+        if (method == LocalDateTime_ToDateTimeUnspecified)
+        {
+            return _sqlExpressionFactory.Convert(
+                instance!,
+                typeof(DateTime),
+                _typeMappingSource.FindMapping(typeof(DateTime), "timestamp without time zone"));
+        }
+
         return null;
     }
 
diff --git a/test/EFCore.PG.NodaTime.FunctionalTests/NodaTimeQueryNpgsqlTest.cs b/test/EFCore.PG.NodaTime.FunctionalTests/NodaTimeQueryNpgsqlTest.cs
index 2e944efc6..2e5e625f2 100644
--- a/test/EFCore.PG.NodaTime.FunctionalTests/NodaTimeQueryNpgsqlTest.cs
+++ b/test/EFCore.PG.NodaTime.FunctionalTests/NodaTimeQueryNpgsqlTest.cs
@@ -408,6 +408,24 @@ LIMIT 1
 """);
     }
 
+    [ConditionalTheory]
+    [MemberData(nameof(IsAsyncData))]
+    public async Task LocalDateTime_ToDateTimeUnspecified(bool async)
+    {
+        await AssertQuery(
+            async,
+            ss => ss.Set<NodaTimeTypes>()
+                .Where(t => t.LocalDateTime.ToDateTimeUnspecified() == new DateTime(2018, 4, 20, 10, 31, 33, 666)),
+            entryCount: 1);
+
+        AssertSql(
+            """
+            SELECT n."Id", n."DateInterval", n."Duration", n."Instant", n."InstantRange", n."Interval", n."LocalDate", n."LocalDate2", n."LocalDateRange", n."LocalDateTime", n."LocalTime", n."Long", n."OffsetTime", n."Period", n."TimeZoneId", n."ZonedDateTime"
+            FROM "NodaTimeTypes" AS n
+            WHERE n."LocalDateTime"::timestamp = TIMESTAMP '2018-04-20 10:31:33.666'
+            """);
+    }
+
     #endregion LocalDateTime
 
     #region LocalDate