diff --git a/src/nfc.cc b/src/nfc.cc
index 294d90c..0f453e4 100644
--- a/src/nfc.cc
+++ b/src/nfc.cc
@@ -599,6 +599,10 @@ bool isNFC(basic_string_view<CharT> s)
 template bool isNFC<char>(string_view);
 template bool isNFC<char16_t>(u16string_view);
 
+// should be unecessary, but... well...
+template std::string toNFC<char>(string_view);
+template std::u16string toNFC<char16_t>(u16string_view);
+
 
 bool isUtf8(const char* begin, const char* end)
 try{