diff --git a/backend/Backend.cpp b/backend/Backend.cpp
index ce606dd..6f334c7 100644
--- a/backend/Backend.cpp
+++ b/backend/Backend.cpp
@@ -63,7 +63,7 @@
                                                    client_size);
   display->total_stats().total_pixops_ += CalcPixOps(layers, 0, layers.size());
 
-  return *num_types ? HWC2::Error::HasChanges : HWC2::Error::None;
+  return *num_types != 0 ? HWC2::Error::HasChanges : HWC2::Error::None;
 }
 
 std::tuple<int, size_t> Backend::GetClientLayers(