diff --git a/lib/sig.js b/lib/sig.js
index d7454268..769834aa 100644
--- a/lib/sig.js
+++ b/lib/sig.js
@@ -61,8 +61,9 @@ exports.extractFunctions = body => {
       const functionStart = `${functionName}=function(a)`;
       const ndx = body.indexOf(functionStart);
       if (ndx >= 0) {
-        const subBody = body.slice(ndx + functionStart.length);
-        const functionBody = `var ${functionStart}${utils.cutAfterJSON(subBody)};${functionName}(ncode);`;
+        const end = body.indexOf('.join("")};', ndx);
+        const subBody = body.slice(ndx, end);
+        const functionBody = `${subBody}.join("")};${functionName}(ncode);`;
         functions.push(functionBody);
       }
     }