diff --git a/Flow.Launcher/Storage/UserSelectedRecord.cs b/Flow.Launcher/Storage/UserSelectedRecord.cs
index 8d8956cfa..23d8c4faf 100644
--- a/Flow.Launcher/Storage/UserSelectedRecord.cs
+++ b/Flow.Launcher/Storage/UserSelectedRecord.cs
@@ -28,6 +28,11 @@ namespace Flow.Launcher.Storage
 
         private static int GenerateStaticHashCode(string s, int start = HASH_INITIAL)
         {
+            if (s == null)
+            {
+                return start;
+            }
+
             unchecked
             {
                 // skip the empty space
@@ -101,4 +106,4 @@ namespace Flow.Launcher.Storage
             return selectedCount;
         }
     }
-}
+}
\ No newline at end of file