diff --git a/Userland/Libraries/LibRegex/RegexParser.cpp b/Userland/Libraries/LibRegex/RegexParser.cpp
index b56797fd3c..3bf96475d2 100644
--- a/Userland/Libraries/LibRegex/RegexParser.cpp
+++ b/Userland/Libraries/LibRegex/RegexParser.cpp
@@ -954,12 +954,10 @@ bool ECMA262Parser::parse_quantifier(ByteCode& stack, size_t& match_length_minim
         if (match(TokenType::Comma)) {
             consume();
             auto high_bound = read_digits();
-            if (!high_bound.has_value()) {
-                set_error(Error::InvalidBraceContent);
-                return false;
-            }
-
-            repeat_max = high_bound.value();
+            if (high_bound.has_value())
+                repeat_max = high_bound.value();
+        } else {
+            repeat_max = repeat_min;
         }
 
         if (!match(TokenType::RightCurly)) {
diff --git a/Userland/Libraries/LibRegex/Tests/Regex.cpp b/Userland/Libraries/LibRegex/Tests/Regex.cpp
index 9e123fce56..378fef5b13 100644
--- a/Userland/Libraries/LibRegex/Tests/Regex.cpp
+++ b/Userland/Libraries/LibRegex/Tests/Regex.cpp
@@ -563,6 +563,7 @@ TEST_CASE(ECMA262_match)
         { "^(?:^^\\.?|[!+-]|!=|!==|#|%|%=|&|&&|&&=|&=|\\(|\\*|\\*=|\\+=|,|-=|->|\\/|\\/=|:|::|;|<|<<|<<=|<=|=|==|===|>|>=|>>|>>=|>>>|>>>=|[?@[^]|\\^=|\\^\\^|\\^\\^=|{|\\||\\|=|\\|\\||\\|\\|=|~|break|case|continue|delete|do|else|finally|instanceof|return|throw|try|typeof)\\s*(\\/(?=[^*/])(?:[^/[\\\\]|\\\\[\\S\\s]|\\[(?:[^\\\\\\]]|\\\\[\\S\\s])*(?:]|$))+\\/)",
                  "return /xx/", true, ECMAScriptFlags::BrowserExtended
         }, // #5517, appears to be matching JS expressions that involve regular expressions...
+        { "a{2,}", "aaaa" }, // #5518
     };
     // clang-format on