1 files changed, 1 insertions, 1 deletions
diff --git a/util.c b/util.c
index d5cc25690f..9720ce73ea 100644
--- a/util.c
+++ b/util.c
@@ -4357,7 +4357,7 @@ Perl_parse_unicode_opts(pTHX_ char **popt)
        opt = PERL_UNICODE_DEFAULT_FLAGS;
 
   if (opt & ~PERL_UNICODE_ALL_FLAGS)
-       Perl_croak(aTHX_ "Unknown Unicode option value 0x%"UVXf,
+       Perl_croak(aTHX_ "Unknown Unicode option value 0x%"IVdf,
 		  (UV) (opt & ~PERL_UNICODE_ALL_FLAGS));
 
   *popt = p;