diff --git a/src/graphics/GraphicsCacheItem.cpp b/src/graphics/GraphicsCacheItem.cpp
index e4bfb019f9..fafa78bdcb 100644
--- a/src/graphics/GraphicsCacheItem.cpp
+++ b/src/graphics/GraphicsCacheItem.cpp
@@ -359,7 +359,7 @@ bool CacheItem::Impl::tryDisplayFormat(FileName & filename, string & from)
 		return false;
 	}
 
-	zipped_ = formats.isZippedFile(filename);
+	zipped_ = formats.isZippedFile(filename_);
 	if (zipped_) {
 		unzipped_filename_ = FileName::tempName(
 			filename_.toFilesystemEncoding());