diff --git a/src/string.cc b/src/string.cc
index 2ed771569..e4b5c0e21 100644
--- a/src/string.cc
+++ b/src/string.cc
@@ -151,6 +151,15 @@ InplaceString<24> to_string(float val)
     return res;
 }
 
+InplaceString<8> to_string(Codepoint c)
+{
+    InplaceString<8> res;
+    char* ptr = res.m_data;
+    utf8::dump(ptr, c);
+    res.m_length = (int)(ptr - res.m_data);
+    return res;
+}
+
 bool subsequence_match(StringView str, StringView subseq)
 {
     auto it = str.begin();
diff --git a/src/string.hh b/src/string.hh
index 424e994c2..c853ebe48 100644
--- a/src/string.hh
+++ b/src/string.hh
@@ -277,6 +277,7 @@ InplaceString<16> to_string(int val);
 InplaceString<24> to_string(size_t val);
 InplaceString<24> to_string(Hex val);
 InplaceString<24> to_string(float val);
+InplaceString<8>  to_string(Codepoint c);
 
 template<typename RealType, typename ValueType>
 decltype(to_string(std::declval<ValueType>()))