diff --git a/engines/grim/registry.cpp b/engines/grim/registry.cpp
index 20f0c09cb51..9a6d0a33fad 100644
--- a/engines/grim/registry.cpp
+++ b/engines/grim/registry.cpp
@@ -156,6 +156,7 @@ Registry::Value &Registry::value(const Common::String &key) {
 	}
 
 	assert(0);
+	return _dummy; // Silence warning
 }
 
 const Registry::Value &Registry::value(const Common::String &key) const {
@@ -194,6 +195,7 @@ const Registry::Value &Registry::value(const Common::String &key) const {
 	}
 
 	assert(0);
+	return _dummy; // Silence warning
 }
 
 const Common::String &Registry::getString(const Common::String &key) const {
diff --git a/engines/grim/registry.h b/engines/grim/registry.h
index 34a7965f94c..74646705ed5 100644
--- a/engines/grim/registry.h
+++ b/engines/grim/registry.h
@@ -93,6 +93,7 @@ private:
 	Value _joystick;
 	Value _spewOnError;
 	Value _transcript;
+	Value _dummy;
 
 	bool _dirty;