diff --git a/src/xkbcomp/ast.h b/src/xkbcomp/ast.h
index ee61106..6c51ce4 100644
--- a/src/xkbcomp/ast.h
+++ b/src/xkbcomp/ast.h
@@ -243,7 +243,6 @@ typedef struct {
 
 union ExprDef {
     ParseCommon common;
-    /* Maybe someday we can use C11 anonymous struct for ExprCommon here. */
     ExprCommon expr;
     ExprIdent ident;
     ExprString string;