diff --git a/glfw/cocoa_window.m b/glfw/cocoa_window.m
index 2a9b805fe..42495081c 100644
--- a/glfw/cocoa_window.m
+++ b/glfw/cocoa_window.m
@@ -1671,7 +1671,6 @@ - (BOOL) prepareForDragOperation:(id<NSDraggingInfo>) sender {
     NSMutableArray<NSString *> *items = [NSMutableArray array];
     NSCharacterSet *allowedChars = [NSCharacterSet URLQueryAllowedCharacterSet];
     for (NSURL *url in urls) {
-        NSCharacterSet *allowedChars = c1;
         if ([url isFileURL]) url = [url filePathURL];
         NSString *absoluteString = url.absoluteString;
         NSString *q = [absoluteString stringByAddingPercentEncodingWithAllowedCharacters:allowedChars];