diff --git a/extension/extension.cpp b/extension/extension.cpp
index 9277ef1..1d85d40 100644
--- a/extension/extension.cpp
+++ b/extension/extension.cpp
@@ -238,7 +238,7 @@ static bool dumpCallback(const wchar_t* dump_path,
 
 	sprintf(dumpStoragePath, "%ls\\%ls.txt", dump_path, minidump_id);
 
-	FILE *extra = fopen(dumpStoragePath, L"wb");
+	FILE *extra = fopen(dumpStoragePath, "wb");
 	if (!extra) {
 		printf("Failed to open metadata file!\n");
 		return succeeded;