diff --git a/lexers/embedded/rust.xml b/lexers/embedded/rust.xml
index bd3da6f72..1ee1413c8 100644
--- a/lexers/embedded/rust.xml
+++ b/lexers/embedded/rust.xml
@@ -238,7 +238,7 @@
       <rule pattern="&#39;(\\[&#39;&#34;\\nrt]|\\x[0-7][0-9a-fA-F]|\\0|\\u\{[0-9a-fA-F]{1,6}\}|.)&#39;">
         <token type="LiteralStringChar"/>
       </rule>
-      <rule pattern="(b)(&#39;(\\[&#39;&#34;\\nrt]|\\x[0-9a-fA-F]{2}|\\0|\\u\{[0-9a-fA-F]{1,6}\}|.)&#39;)">
+      <rule pattern="(b)(&#39;(?:\\[&#39;&#34;\\nrt]|\\x[0-9a-fA-F]{2}|\\0|.)&#39;)">
         <bygroups>
           <token type="LiteralStringAffix"/>
           <token type="LiteralStringChar"/>
diff --git a/lexers/testdata/rust/lifetimes_and_loop_labels.expected b/lexers/testdata/rust/lifetimes_and_loop_labels.expected
index eec431f0d..8fafa2989 100644
--- a/lexers/testdata/rust/lifetimes_and_loop_labels.expected
+++ b/lexers/testdata/rust/lifetimes_and_loop_labels.expected
@@ -100,7 +100,8 @@
   {"type":"TextWhitespace","value":" "},
   {"type":"Operator","value":"="},
   {"type":"TextWhitespace","value":" "},
-  {"type":"Error","value":"b'a'"},
+  {"type":"LiteralStringAffix","value":"b"},
+  {"type":"LiteralStringChar","value":"'a'"},
   {"type":"Punctuation","value":";"},
   {"type":"TextWhitespace","value":"\n    "},
   {"type":"KeywordDeclaration","value":"let"},