diff --git a/src/video/kmsdrm/SDL_kmsdrmvulkan.c b/src/video/kmsdrm/SDL_kmsdrmvulkan.c
index c101ead55..a47752948 100644
--- a/src/video/kmsdrm/SDL_kmsdrmvulkan.c
+++ b/src/video/kmsdrm/SDL_kmsdrmvulkan.c
@@ -198,7 +198,7 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
     VkDisplaySurfaceCreateInfoKHR display_plane_surface_create_info;
 
     VkExtent2D image_size;
-    VkDisplayModeKHR display_mode = NULL;
+    VkDisplayModeKHR display_mode = (VkDisplayModeKHR)0;
     VkDisplayModePropertiesKHR display_mode_props = {0};
     VkDisplayModeParametersKHR new_mode_parameters = { {0, 0}, 0};