diff --git a/compiler/src/dmd/cparse.d b/compiler/src/dmd/cparse.d
index 354d83bd4ba..2841ef17552 100644
--- a/compiler/src/dmd/cparse.d
+++ b/compiler/src/dmd/cparse.d
@@ -2088,8 +2088,8 @@ final class CParser(AST) : Parser!AST
                     {
                         auto str = asmName.peekString();
                         p.mangleOverride = str;
-//                      p.adFlags |= AST.VarDeclaration.nounderscore;
-                        p.adFlags |= 4; // cannot get above line to compile on Ubuntu
+                        alias flag = AST.VarDeclaration.nounderscore;
+                        p.adFlags |= flag;
                     }
                 }
                 s = applySpecifier(s, specifier);