--- a/intern/cycles/hydra/mesh.cpp
+++ b/intern/cycles/hydra/mesh.cpp
@@ -54,7 +54,7 @@ VtValue ComputeTriangulatedFaceVaryingPr
                                               const HdType valueType,
                                               HdMeshUtil &meshUtil)
 {
-  if (meshUtil.ComputeTriangulatedFaceVaryingPrimvar(
+  if ((bool)meshUtil.ComputeTriangulatedFaceVaryingPrimvar(
           HdGetValueData(value), value.GetArraySize(), valueType, &value))
   {
     return value;