diff --git a/src/widgets/dialogs/qfiledialog.cpp b/src/widgets/dialogs/qfiledialog.cpp
index 3e4490e..7f0f117 100644
--- a/src/widgets/dialogs/qfiledialog.cpp
+++ b/src/widgets/dialogs/qfiledialog.cpp
@@ -1333,7 +1333,23 @@ QStringList qt_make_filter_list(const QString &filter)
         }
     }
 
-    return f.split(sep);
+    QStringList filters = f.split(sep);
+    for(int i=0; i<filters.count();i++) {
+        if(filters.at(i).indexOf('(') == -1) {
+            QString nf = filters.at(i);
+            int extpos = nf.lastIndexOf(' ');
+            if(extpos<0)
+                extpos=0;
+            nf = nf.insert(extpos,'(');
+            nf = nf.append(')');
+            if(filters.filter(nf).count())
+                filters.removeAt(i--);
+            else
+                filters.replace(i,nf);
+        }
+    }
+
+    return filters;
 }
 
 /*!