diff --git a/background/update.js b/background/update.js
index a8d185ca..8426035e 100644
--- a/background/update.js
+++ b/background/update.js
@@ -185,7 +185,7 @@ global API_METHODS
         json.originalName = json.name;
       }
 
-      if (styleSectionsEqual(json, style)) {
+      if (styleSectionsEqual(json, style, {checkSource: true})) {
         // update digest even if save === false as there might be just a space added etc.
         json.reason = 'update-digest';
         return saveStyle(json)
diff --git a/js/sections-equal.js b/js/sections-equal.js
index 9244ab68..d01c4bfe 100644
--- a/js/sections-equal.js
+++ b/js/sections-equal.js
@@ -12,7 +12,7 @@
  * @returns {Boolean|undefined}
  */
 function styleSectionsEqual(a, b, {ignoreCode, checkSource} = {}) {
-  if (!checkSource &&
+  if (checkSource &&
       typeof a.sourceCode === 'string' &&
       typeof b.sourceCode === 'string') {
     return a.sourceCode === b.sourceCode;