diff --git a/src/doc/layer_io.cpp b/src/doc/layer_io.cpp
index 487d9cefb..ae7134dc2 100644
--- a/src/doc/layer_io.cpp
+++ b/src/doc/layer_io.cpp
@@ -90,7 +90,7 @@ Layer* read_layer(std::istream& is, LayerSubObjectsSerializer* subObjects, Sprit
 
   base::UniquePtr<Layer> layer;
 
-  switch (layer_type) {
+  switch (static_cast<ObjectType>(layer_type)) {
 
     case ObjectType::LayerImage: {
       // Create layer