diff --git a/host/gl/YUVConverter.h b/host/gl/YUVConverter.h
index 7518742..a31103e 100644
--- a/host/gl/YUVConverter.h
+++ b/host/gl/YUVConverter.h
@@ -28,7 +28,7 @@
 namespace gfxstream {
 namespace gl {
 
-enum class YUVPlane {
+enum class YUVPlane : int {
     Y = 0,
     U = 1,
     V = 2,