diff --git a/AK/URLParser.cpp b/AK/URLParser.cpp
index 644a57bf10..9f92f3c4db 100644
--- a/AK/URLParser.cpp
+++ b/AK/URLParser.cpp
@@ -117,7 +117,7 @@ constexpr bool is_double_dot_path_segment(StringView input)
 }
 
 // https://url.spec.whatwg.org/#string-percent-encode-after-encoding
-static DeprecatedString percent_encode_after_encoding(StringView input, URL::PercentEncodeSet percent_encode_set, bool space_as_plus = false)
+DeprecatedString URLParser::percent_encode_after_encoding(StringView input, URL::PercentEncodeSet percent_encode_set, bool space_as_plus)
 {
     // NOTE: This is written somewhat ad-hoc since we don't yet implement the Encoding spec.
 
diff --git a/AK/URLParser.h b/AK/URLParser.h
index 91b2d0068c..0eacf78ae8 100644
--- a/AK/URLParser.h
+++ b/AK/URLParser.h
@@ -57,6 +57,9 @@ public:
 
     static URL parse(StringView input, Optional<URL> const& base_url = {}, Optional<URL> url = {}, Optional<State> state_override = {});
 
+    // https://url.spec.whatwg.org/#string-percent-encode-after-encoding
+    static DeprecatedString percent_encode_after_encoding(StringView input, URL::PercentEncodeSet percent_encode_set, bool space_as_plus = false);
+
 private:
     static Optional<URL> parse_data_url(StringView raw_input);
 };