diff --git a/libobs-d3d11/d3d11-subsystem.hpp b/libobs-d3d11/d3d11-subsystem.hpp
index a1f073400..e23f8f03d 100644
--- a/libobs-d3d11/d3d11-subsystem.hpp
+++ b/libobs-d3d11/d3d11-subsystem.hpp
@@ -84,7 +84,7 @@ static inline DXGI_FORMAT ConvertGSTextureFormat(gs_color_format format)
 
 static inline gs_color_format ConvertDXGITextureFormat(DXGI_FORMAT format)
 {
-	switch (format) {
+	switch ((unsigned long)format) {
 	case DXGI_FORMAT_A8_UNORM:           return GS_A8;
 	case DXGI_FORMAT_R8_UNORM:           return GS_R8;
 	case DXGI_FORMAT_R8G8B8A8_UNORM:     return GS_RGBA;