diff --git a/lib/rules/prefer-regex-literals.js b/lib/rules/prefer-regex-literals.js
index 381d84911ce..b4fb1d4ee46 100644
--- a/lib/rules/prefer-regex-literals.js
+++ b/lib/rules/prefer-regex-literals.js
@@ -152,7 +152,6 @@ module.exports = {
     create(context) {
         const [{ disallowRedundantWrapping = false } = {}] = context.options;
         const sourceCode = context.getSourceCode();
-        const text = sourceCode.getText();
 
         /**
          * Determines whether the given identifier node is a reference to a global variable.
@@ -380,9 +379,9 @@ module.exports = {
 
                                     return fixer.replaceText(
                                         node,
-                                        (tokenBefore && !canTokensBeAdjacent(tokenBefore, newRegExpValue) && /\S/u.test(text[node.range[0] - 1]) ? " " : "") +
+                                        (tokenBefore && !canTokensBeAdjacent(tokenBefore, newRegExpValue) && tokenBefore.range[1] === node.range[0] ? " " : "") +
                                             newRegExpValue +
-                                            (tokenAfter && !canTokensBeAdjacent(newRegExpValue, tokenAfter) && /\S/u.test(text[node.range[1]]) ? " " : "")
+                                            (tokenAfter && !canTokensBeAdjacent(newRegExpValue, tokenAfter) && node.range[1] === tokenAfter.range[0] ? " " : "")
                                     );
                                 }
                             }]