diff --git a/releasenotes.md b/releasenotes.md
index 959b6187b..1e7935a66 100644
--- a/releasenotes.md
+++ b/releasenotes.md
@@ -130,6 +130,7 @@
 - Bitstruct accidentally allowed other arrays than char arrays #2836
 - Bitstruct as substruct fails to properly work with designated initializers. #2827
 - Bug when initializing an inferred array with deep structure using designated init #2826
+- Packed .c3l files without compressions weren't unpacked correctly.
 
 ### Stdlib changes
 - Add `ThreadPool` join function to wait for all threads to finish in the pool without destroying the threads.
diff --git a/src/utils/unzipper.c b/src/utils/unzipper.c
index 4d9d95531..f3bf57f12 100644
--- a/src/utils/unzipper.c
+++ b/src/utils/unzipper.c
@@ -277,6 +277,7 @@ const char *zip_file_write(FILE *zip, ZipFile *file, const char *dir, bool overw
 			}
 			left_to_read -= written;
 		}
+		fclose(f);
 		return NULL;
 	}