diff --git a/examples/descriptorsets/descriptorsets.cpp b/examples/descriptorsets/descriptorsets.cpp
index 3a9fafc7..b905b596 100644
--- a/examples/descriptorsets/descriptorsets.cpp
+++ b/examples/descriptorsets/descriptorsets.cpp
@@ -356,7 +356,7 @@ public:
 				VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
 				VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
 				&cube.uniformBuffer,
-				sizeof(glm::mat4)));
+				sizeof(Cube::Matrices)));
 			VK_CHECK_RESULT(cube.uniformBuffer.map());
 		}