diff --git a/regression/cpp/enum_class1/main.cpp b/regression/cpp/enum_class1/main.cpp
index 97afef4a89..db133f6eaa 100644
--- a/regression/cpp/enum_class1/main.cpp
+++ b/regression/cpp/enum_class1/main.cpp
@@ -1,14 +1,17 @@
-enum class Color : char { red, blue };
+enum class Color1 : char { red, blue };
+
+enum Color2 : char { red, blue };
 
 // defaults to int
 enum class TrafficLight { red, yellow, green };
 
-static_assert(sizeof(Color)==sizeof(char), "size of Color");
-static_assert(sizeof(Color::red)==sizeof(char), "size of Color::red");
+static_assert(sizeof(Color1)==sizeof(char), "size of Color1");
+static_assert(sizeof(Color2)==sizeof(char), "size of Color2");
+static_assert(sizeof(Color1::red)==sizeof(char), "size of Color1::red");
 static_assert(sizeof(TrafficLight::red)==sizeof(int), "size of TrafficLight::red");
 
 int main()
 {
-  Color c;
-  c=Color::red;
+  Color1 c;
+  c=Color1::red;
 }