diff --git a/src/harness/win95/polyfill.c b/src/harness/win95/polyfill.c
index ecfd6ca4..f6c029a3 100644
--- a/src/harness/win95/polyfill.c
+++ b/src/harness/win95/polyfill.c
@@ -26,9 +26,10 @@
 uint32_t GetFileAttributesA_(char* lpFileName) {
 
     FILE* f = fopen(lpFileName, "r");
-    if (!f) {
+    if (f == NULL) {
         return INVALID_FILE_ATTRIBUTES;
     }
+    fclose(f);
     return FILE_ATTRIBUTE_NORMAL;
 }