diff --git a/src/joystick/SDL_gamecontroller.c b/src/joystick/SDL_gamecontroller.c
index 2f32a3263..f8c5ad789 100644
--- a/src/joystick/SDL_gamecontroller.c
+++ b/src/joystick/SDL_gamecontroller.c
@@ -675,6 +675,9 @@ SDL_PrivateAddMappingForGUID(SDL_JoystickGUID jGUID, const char *mappingString,
             pControllerMapping->priority = priority;
             /* refresh open controllers */
             SDL_PrivateGameControllerRefreshMapping(pControllerMapping);
+        } else {
+            SDL_free(pchName);
+            SDL_free(pchMapping);
         }
         *existing = SDL_TRUE;
     } else {