diff --git a/extendedcommands.c b/extendedcommands.c
index 43d449a..8bd447a 100644
--- a/extendedcommands.c
+++ b/extendedcommands.c
@@ -694,7 +694,7 @@ void show_partition_menu()
     			options[mountable_volumes+i] = e->txt;
     		}
 
-        if (is_data_media()) {
+        if (!is_data_media()) {
           options[mountable_volumes + formatable_volumes] = "mount USB storage";
           options[mountable_volumes + formatable_volumes + 1] = NULL;
         }