diff --git a/lib/ace/mode/rust_highlight_rules.js b/lib/ace/mode/rust_highlight_rules.js
index 181cf11a..056e7a55 100644
--- a/lib/ace/mode/rust_highlight_rules.js
+++ b/lib/ace/mode/rust_highlight_rules.js
@@ -84,9 +84,8 @@ var RustHighlightRules = function() {
               { token: 'constant.character.escape.source.rust',
                 regex: stringEscape },
               { defaultToken: 'string.quoted.double.source.rust' } ] },
-         { token: [ 'keyword.source.rust', 'meta.function.source.rust',
-              'entity.name.function.source.rust', 'meta.function.source.rust' ],
-           regex: '\\b(fn)(\\s+)([a-zA-Z_][a-zA-Z0-9_][\\w\\:,+ \\\'<>]*)(\\s*\\()' },
+         { token: [ 'keyword.source.rust', 'text', 'entity.name.function.source.rust' ],
+           regex: '\\b(fn)(\\s+)([a-zA-Z_][a-zA-Z0-9_]*)' },
          { token: 'support.constant', regex: '\\b[a-zA-Z_][\\w\\d]*::' },
          { token: 'keyword.source.rust',
            regex: '\\b(?:as|assert|break|claim|const|do|drop|else|extern|fail|for|if|impl|in|let|log|loop|match|mod|module|move|mut|Owned|priv|pub|pure|ref|return|unchecked|unsafe|use|while|mod|Send|static|trait|class|struct|enum|type)\\b' },