diff --git a/js-packages/@fortawesome/fontawesome-svg-core/import.macro.js b/js-packages/@fortawesome/fontawesome-svg-core/import.macro.js
index c673bb040..2ca9833c1 100644
--- a/js-packages/@fortawesome/fontawesome-svg-core/import.macro.js
+++ b/js-packages/@fortawesome/fontawesome-svg-core/import.macro.js
@@ -15,7 +15,7 @@ const styles = [
 ]
 
 function importer ({references, state, babel, source, config}) {
-  const license = (config !== undefined ? config.license : 'free')
+  const license = ((config !== undefined && config.license !== undefined) ? config.license : 'free')
 
   if (!['free', 'pro'].includes(license)) {
     throw new Error(