diff --git a/src/ModernGL.jl b/src/ModernGL.jl
index 3cdcb4d..527f744 100644
--- a/src/ModernGL.jl
+++ b/src/ModernGL.jl
@@ -71,7 +71,7 @@ macro GenEnums(list)
     end
     dictname = gensym()
     enumtype =  quote
-        immutable $(enumName){Sym, T} <: Enum
+        struct $(enumName){Sym, T} <: Enum
             number::T
             name::Symbol
         end