diff --git a/GPU/Common/VertexDecoderCommon.h b/GPU/Common/VertexDecoderCommon.h
index 6a06093902..d3785e13c9 100644
--- a/GPU/Common/VertexDecoderCommon.h
+++ b/GPU/Common/VertexDecoderCommon.h
@@ -460,7 +460,8 @@ public:
 
 	bool throughmode;
 	bool skinInDecode;
-	u8 size;
+	// With morph and weights, this can be more than 256 bytes.
+	u16 size;
 	u8 onesize_;
 
 	u8 weightoff;