--- a/js/src/imacro_asm.js.in
+++ b/js/src/imacro_asm.js.in
@@ -152,17 +152,17 @@ const line_regexp_parts = [
 ];
 
 const line_regexp = new RegExp(line_regexp_parts.join(""));
 
 function assemble(filename) {
     let igroup = null, imacro = null;
     let opcode2extra = [];
 
-    print("/* GENERATED BY imacro_asm.js FROM " + filename + " -- DO NOT EDIT!!! */");
+    print("/* GENERATED BY imacro_asm.js -- DO NOT EDIT!!! */");
 
     let s = snarf(filename);
     let a = s.split('\n');
     for (let i = 0; i < a.length; i++) {
         if (/^\s*(?:#.*)?$/.test(a[i]))
             continue;
         let m = line_regexp.exec(a[i]);
         if (!m)

--- a/js/src/imacros.c.out
+++ b/js/src/imacros.c.out
@@ -1,9 +1,9 @@
-/* GENERATED BY imacro_asm.js FROM ../imacros.jsasm -- DO NOT EDIT!!! */
+/* GENERATED BY imacro_asm.js -- DO NOT EDIT!!! */
 static struct {
     jsbytecode any_obj[37];
     jsbytecode obj_any[39];
 } equality_imacros = {
     {
 /* 0*/  JSOP_DUP,
 /* 1*/  JSOP_DUP,
 /* 2*/  JSOP_GETPROP, 0, COMMON_ATOM_INDEX(valueOf),