diff --git a/AK/StringConversions.cpp b/AK/StringConversions.cpp
index c9dfeaa214c..1a127ec8961 100644
--- a/AK/StringConversions.cpp
+++ b/AK/StringConversions.cpp
@@ -71,7 +71,7 @@ Optional<ParseFirstNumberResult<T>> parse_first_number(Utf16View const& string,
     if (string.has_ascii_storage())
         return parse_first_number<T>(string.bytes(), trim_whitespace, base);
 
-    auto trimmed_string = trim_whitespace == TrimWhitespace::Yes ? string.trim_whitespace() : string;
+    auto trimmed_string = trim_whitespace == TrimWhitespace::Yes ? string.trim_ascii_whitespace() : string;
     return from_chars<char16_t, T>(trimmed_string.utf16_span().data(), trimmed_string.length_in_code_units(), base);
 }
 
@@ -107,7 +107,7 @@ Optional<T> parse_number(Utf16View const& string, TrimWhitespace trim_whitespace
     if (string.has_ascii_storage())
         return parse_number<T>(string.bytes(), trim_whitespace, base);
 
-    auto trimmed_string = trim_whitespace == TrimWhitespace::Yes ? string.trim_whitespace() : string;
+    auto trimmed_string = trim_whitespace == TrimWhitespace::Yes ? string.trim_ascii_whitespace() : string;
 
     auto result = parse_first_number<T>(trimmed_string, TrimWhitespace::No, base);
     if (!result.has_value())
diff --git a/AK/Utf16View.h b/AK/Utf16View.h
index 7aa17d1c8c7..22d9c0a0dea 100644
--- a/AK/Utf16View.h
+++ b/AK/Utf16View.h
@@ -381,7 +381,7 @@ public:
         return substring_view(substring_start, substring_length);
     }
 
-    [[nodiscard]] constexpr Utf16View trim_whitespace(TrimMode mode = TrimMode::Both) const
+    [[nodiscard]] constexpr Utf16View trim_ascii_whitespace(TrimMode mode = TrimMode::Both) const
     {
         static constexpr Utf16View white_space { u" \n\t\v\f\r", 6uz };
         return trim(white_space, mode);
diff --git a/Libraries/LibWeb/Editing/Commands.cpp b/Libraries/LibWeb/Editing/Commands.cpp
index 999bdede767..da51abe991b 100644
--- a/Libraries/LibWeb/Editing/Commands.cpp
+++ b/Libraries/LibWeb/Editing/Commands.cpp
@@ -512,7 +512,7 @@ enum class FontSizeMode : u8 {
 bool command_font_size_action(DOM::Document& document, Utf16View const& value)
 {
     // 1. Strip leading and trailing whitespace from value.
-    auto resulting_value = value.trim_whitespace();
+    auto resulting_value = value.trim_ascii_whitespace();
 
     // 2. If value is not a valid floating point number, and would not be a valid floating point number if a single
     //    leading "+" character were stripped, return false.