diff --git a/src/common/filesystem/file_zip.cpp b/src/common/filesystem/file_zip.cpp
index 0096507bfd9..b3acb8d1368 100644
--- a/src/common/filesystem/file_zip.cpp
+++ b/src/common/filesystem/file_zip.cpp
@@ -234,6 +234,8 @@ bool FZipFile::Open(bool quiet, LumpFilterInfo* filter)
 		}
 
 		name.ToLower();
+		if (name.IndexOf("filter/") == 0)
+			continue; // 'filter' is a reserved name of the file system.
 		if (name.IndexOf("__macosx") == 0) 
 			continue; // skip Apple garbage. At this stage only the root folder matters.
 		if (!foundprefix)