diff --git a/lib/internal/modules/cjs/helpers.js b/lib/internal/modules/cjs/helpers.js
index 2e5290b4520a27..874805beccd39c 100644
--- a/lib/internal/modules/cjs/helpers.js
+++ b/lib/internal/modules/cjs/helpers.js
@@ -5,13 +5,6 @@ const path = require('path');
 const { pathToFileURL } = require('internal/url');
 const { URL } = require('url');
 
-const {
-  CHAR_LINE_FEED,
-  CHAR_CARRIAGE_RETURN,
-  CHAR_EXCLAMATION_MARK,
-  CHAR_HASH,
-} = require('internal/constants');
-
 // Invoke with makeRequireFunction(module) where |module| is the Module object
 // to use as the context for the require() function.
 function makeRequireFunction(mod) {
@@ -67,31 +60,17 @@ function stripBOM(content) {
  */
 function stripShebang(content) {
   // Remove shebang
-  var contLen = content.length;
-  if (contLen >= 2) {
-    if (content.charCodeAt(0) === CHAR_HASH &&
-        content.charCodeAt(1) === CHAR_EXCLAMATION_MARK) {
-      if (contLen === 2) {
-        // Exact match
-        content = '';
-      } else {
-        // Find end of shebang line and slice it off
-        var i = 2;
-        for (; i < contLen; ++i) {
-          var code = content.charCodeAt(i);
-          if (code === CHAR_LINE_FEED || code === CHAR_CARRIAGE_RETURN)
-            break;
-        }
-        if (i === contLen)
-          content = '';
-        else {
-          // Note that this actually includes the newline character(s) in the
-          // new output. This duplicates the behavior of the regular expression
-          // that was previously used to replace the shebang line
-          content = content.slice(i);
-        }
-      }
-    }
+  if (content.charAt(0) === '#' && content.charAt(1) === '!') {
+    // Find end of shebang line and slice it off
+    let index = content.indexOf('\n', 2);
+    if (index === -1)
+      return '';
+    if (content.charAt(index - 1) === '\r')
+      index--;
+    // Note that this actually includes the newline character(s) in the
+    // new output. This duplicates the behavior of the regular expression
+    // that was previously used to replace the shebang line.
+    content = content.slice(index);
   }
   return content;
 }