diff --git a/gpu/path.go b/gpu/path.go
index 8b5beace..c65c81c1 100644
--- a/gpu/path.go
+++ b/gpu/path.go
@@ -58,6 +58,7 @@ type coverUniforms struct {
 	uvCoverTransform [4]float32
 	uvTransformR1    [4]float32
 	uvTransformR2    [4]float32
+	_                float32
 }
 
 type stenciler struct {