diff --git a/examples/gltfscenerendering/README.md b/examples/gltfscenerendering/README.md
index 49016879..6c661e82 100644
--- a/examples/gltfscenerendering/README.md
+++ b/examples/gltfscenerendering/README.md
@@ -115,7 +115,7 @@ For each material we then set constant properties for the fragment shader using
 
 ```cpp
 	struct MaterialSpecializationData {
-		bool alphaMask;
+		VkBool32 alphaMask;
 		float alphaMaskCutoff;
 	} materialSpecializationData;