diff --git a/src/dos/drive_local.cpp b/src/dos/drive_local.cpp
index 11b671c575..9a3fe7c39a 100644
--- a/src/dos/drive_local.cpp
+++ b/src/dos/drive_local.cpp
@@ -2958,6 +2958,7 @@ bool LocalFile::LockFile(uint8_t mode, uint32_t pos, uint16_t size) {
 		case EINTR:
 		case ENOLCK:
 		case EAGAIN:
+		case EACCES:
 			DOS_SetError(0x21);
 			break;
 		case EBADF: