diff --git a/src/gpu/metal/SDL_gpu_metal.m b/src/gpu/metal/SDL_gpu_metal.m
index c8713885d0..a057eab7bb 100644
--- a/src/gpu/metal/SDL_gpu_metal.m
+++ b/src/gpu/metal/SDL_gpu_metal.m
@@ -3545,6 +3545,8 @@ static void METAL_INTERNAL_PerformPendingDestroys(
     Sint32 i;
     Uint32 j;
 
+    SDL_LockMutex(renderer->disposeLock);
+
     for (i = renderer->bufferContainersToDestroyCount - 1; i >= 0; i -= 1) {
         referenceCount = 0;
         for (j = 0; j < renderer->bufferContainersToDestroy[i]->bufferCount; j += 1) {
@@ -3574,6 +3576,8 @@ static void METAL_INTERNAL_PerformPendingDestroys(
             renderer->textureContainersToDestroyCount -= 1;
         }
     }
+
+    SDL_UnlockMutex(renderer->disposeLock);
 }
 
 // Fences