diff --git a/Libraries/LibGfx/Bitmap.h b/Libraries/LibGfx/Bitmap.h
index 9cd4b79cad0..6dfca044939 100644
--- a/Libraries/LibGfx/Bitmap.h
+++ b/Libraries/LibGfx/Bitmap.h
@@ -24,17 +24,18 @@ enum class BitmapFormat {
     RGBA8888,
 };
 
-inline bool is_valid_bitmap_format(unsigned format)
+inline bool is_valid_bitmap_format(u32 const format)
 {
     switch (format) {
-    case (unsigned)BitmapFormat::Invalid:
-    case (unsigned)BitmapFormat::BGRx8888:
-    case (unsigned)BitmapFormat::RGBx8888:
-    case (unsigned)BitmapFormat::BGRA8888:
-    case (unsigned)BitmapFormat::RGBA8888:
+    case static_cast<u32>(BitmapFormat::Invalid):
+    case static_cast<u32>(BitmapFormat::BGRx8888):
+    case static_cast<u32>(BitmapFormat::RGBx8888):
+    case static_cast<u32>(BitmapFormat::BGRA8888):
+    case static_cast<u32>(BitmapFormat::RGBA8888):
         return true;
+    default:
+        return false;
     }
-    return false;
 }
 
 enum class StorageFormat {