diff --git a/src/common/src/createQRScannerAdapter.js b/src/common/src/createQRScannerAdapter.js
index ac5ab328..578452dc 100644
--- a/src/common/src/createQRScannerAdapter.js
+++ b/src/common/src/createQRScannerAdapter.js
@@ -44,7 +44,7 @@ function resetBodyStyles() {
       }
     }
     for (var key of Object.keys(document.body.style)) {
-      document.body.style[key] = initialStyles[key] ?? '';
+      document.body.style[key] = initialStyles[key] ? initialStyles[key] : '';
     }
   }, 100);
 }
diff --git a/www/www.min.js b/www/www.min.js
index 4c81eea1..743566d3 100644
--- a/www/www.min.js
+++ b/www/www.min.js
@@ -148,7 +148,7 @@ function resetBodyStyles() {
       }
     }
     for (var key of Object.keys(document.body.style)) {
-      document.body.style[key] = initialStyles[key] ?? '';
+      document.body.style[key] = initialStyles[key] ? initialStyles[key] : '';
     }
   }, 100);
 }