1 files changed, 1 insertions, 1 deletions
diff --git a/utf8.c b/utf8.c
index f3e36337bd..19f54cab39 100644
--- a/utf8.c
+++ b/utf8.c
@@ -896,7 +896,7 @@ Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen)
     }
 
     if (bytelen & 1)
-	Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen %"UVf, (UV)bytelen);
+	Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen %"UVuf, (UV)bytelen);
 
     pend = p + bytelen;