diff --git a/Userland/Libraries/LibJS/Runtime/JSONObject.cpp b/Userland/Libraries/LibJS/Runtime/JSONObject.cpp
index a044f25158..18843be5c6 100644
--- a/Userland/Libraries/LibJS/Runtime/JSONObject.cpp
+++ b/Userland/Libraries/LibJS/Runtime/JSONObject.cpp
@@ -383,7 +383,7 @@ DeprecatedString JSONObject::quote_json_string(DeprecatedString string)
             break;
         default:
             // b. Else if C has a numeric value less than 0x0020 (SPACE), or if C has the same numeric value as a leading surrogate or trailing surrogate, then
-            if (code_point < 0x20 || Utf16View::is_high_surrogate(code_point) || Utf16View::is_low_surrogate(code_point)) {
+            if (code_point < 0x20 || is_unicode_surrogate(code_point)) {
                 // i. Let unit be the code unit whose numeric value is that of C.
                 // ii. Set product to the string-concatenation of product and UnicodeEscape(unit).
                 builder.appendff("\\u{:04x}", code_point);
diff --git a/Userland/Libraries/LibJS/Runtime/StringPrototype.cpp b/Userland/Libraries/LibJS/Runtime/StringPrototype.cpp
index 174555383b..0877f3ee60 100644
--- a/Userland/Libraries/LibJS/Runtime/StringPrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/StringPrototype.cpp
@@ -121,7 +121,7 @@ CodePoint code_point_at(Utf16View const& string, size_t position)
     auto code_point = static_cast<u32>(first);
 
     // 5. If first is not a leading surrogate or trailing surrogate, then
-    if (!Utf16View::is_high_surrogate(first) && !Utf16View::is_low_surrogate(first)) {
+    if (!is_unicode_surrogate(first)) {
         // a. Return the Record { [[CodePoint]]: cp, [[CodeUnitCount]]: 1, [[IsUnpairedSurrogate]]: false }.
         return { false, code_point, 1 };
     }