diff --git a/src/ol/render/canvas/Executor.js b/src/ol/render/canvas/Executor.js
index 1ec4c94eb0..86bf232fd0 100644
--- a/src/ol/render/canvas/Executor.js
+++ b/src/ol/render/canvas/Executor.js
@@ -75,7 +75,17 @@ function getDeclutterBox(replayImageOrLabelArgs) {
   return replayImageOrLabelArgs[3].declutterBox;
 }
 
-const rtlRegEx = /[\u0591-\u07FF]/;
+const rtlRegEx = new RegExp(
+  /* eslint-disable prettier/prettier */
+  '[' +
+    String.fromCharCode(0x00591) + '-' + String.fromCharCode(0x008ff) +
+    String.fromCharCode(0x0fb1d) + '-' + String.fromCharCode(0x0fdff) +
+    String.fromCharCode(0x0fe70) + '-' + String.fromCharCode(0x0fefc) +
+    String.fromCharCode(0x10800) + '-' + String.fromCharCode(0x10fff) +
+    String.fromCharCode(0x1e800) + '-' + String.fromCharCode(0x1efff) +
+  ']'
+  /* eslint-enable prettier/prettier */
+);
 
 /**
  * @param {string} text Text.