Fix misformed UVxf format in op.c

1 files changed, 1 insertions, 1 deletions

diff --git a/op.c b/op.c
index 58b2508f5f..0d6351a725 100644
--- a/op.c
+++ b/op.c
@@ -5774,7 +5774,7 @@ Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
 	    if (PL_madskills) {
 		if (strEQ(name, "import")) {
 		    PL_formfeed = MUTABLE_SV(cv);
-		    Perl_warner(aTHX_ packWARN(WARN_VOID), UVxf"\n", (UV)cv);
+		    Perl_warner(aTHX_ packWARN(WARN_VOID), "0x%"UVxf"\n", (UV)cv);
 		}
 	    }
 	    GvCVGEN(gv) = 0;