diff --git a/src/gpu/metal/SDL_gpu_metal.m b/src/gpu/metal/SDL_gpu_metal.m
index 6a75322c5d..7e44bfb0d5 100644
--- a/src/gpu/metal/SDL_gpu_metal.m
+++ b/src/gpu/metal/SDL_gpu_metal.m
@@ -3407,7 +3407,7 @@ static bool METAL_ClaimWindow(
         MetalWindowData *windowData = METAL_INTERNAL_FetchWindowData(window);
 
         if (windowData == NULL) {
-            windowData = (MetalWindowData *)SDL_malloc(sizeof(MetalWindowData));
+            windowData = (MetalWindowData *)SDL_calloc(1, sizeof(MetalWindowData));
             windowData->window = window;
 
             if (METAL_INTERNAL_CreateSwapchain(renderer, windowData, SDL_GPU_SWAPCHAINCOMPOSITION_SDR, SDL_GPU_PRESENTMODE_VSYNC)) {