diff --git a/web/pdf_find_controller.js b/web/pdf_find_controller.js
index 0f3f04c55..47a66946a 100644
--- a/web/pdf_find_controller.js
+++ b/web/pdf_find_controller.js
@@ -77,7 +77,6 @@ const DIACRITICS_EXCEPTION = new Set([
 let DIACRITICS_EXCEPTION_STR; // Lazily initialized, see below.
 
 const DIACRITICS_REG_EXP = /\p{M}+/gu;
-const SPECIAL_PUNCTUATION_CHARACTERS = /[.?*{}()[\]\\]/g;
 const SPECIAL_CHARS_REG_EXP = /([+^$|])|(\p{P}+)|(\s+)|(\p{M})|(\p{L})/gu;
 const NOT_DIACRITIC_FROM_END_REG_EXP = /([^\p{M}])\p{M}*$/u;
 const NOT_DIACRITIC_FROM_START_REG_EXP = /^\p{M}*([^\p{M}])/u;
@@ -735,14 +734,11 @@ class PDFFindController {
 
         if (p1) {
           // Escape characters like *+?... to not interfere with regexp syntax.
-          return addExtraWhitespaces(p1, `\\${p1}`);
+          return addExtraWhitespaces(p1, RegExp.escape(p1));
         }
         if (p2) {
           // Allow whitespaces around group of punctuation signs.
-          return addExtraWhitespaces(
-            p2,
-            p2.replaceAll(SPECIAL_PUNCTUATION_CHARACTERS, "\\$&")
-          );
+          return addExtraWhitespaces(p2, RegExp.escape(p2));
         }
         if (p3) {
           // Replace spaces by \s+ to be sure to match any spaces.