diff --git a/src/slic3r/Utils/MacDarkMode.mm b/src/slic3r/Utils/MacDarkMode.mm
index 58ff02ff5d1..a7c063e1870 100644
--- a/src/slic3r/Utils/MacDarkMode.mm
+++ b/src/slic3r/Utils/MacDarkMode.mm
@@ -151,6 +151,9 @@ - (BOOL)prepareForDragOperation2:(id<NSDraggingInfo>)info
 - (BOOL)performDragOperation2:(id<NSDraggingInfo>)info
 {
     NSURL* url = [NSURL URLFromPasteboard:[info draggingPasteboard]];
+    if (!url) {
+        return FALSE;
+    }
     NSString * path = [url path];
     url = [NSURL fileURLWithPath: path];
     [self loadFileURL:url allowingReadAccessToURL:url];