1 files changed, 3 insertions, 2 deletions
diff --git a/mg.c b/mg.c
index b08cee356b..e037282cd4 100644
--- a/mg.c
+++ b/mg.c
@@ -1941,8 +1941,9 @@ int
 Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
 {
     dTHR;
-    DEBUG_S(PerlIO_printf(Perl_debug_log, "0x%lx: magic_mutexfree 0x%lx\n",
-			  (unsigned long)thr, (unsigned long)sv);)
+    DEBUG_S(PerlIO_printf(Perl_debug_log,
+			  "0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
+			  PTR2UV(thr), PTR2UV(sv));)
     if (MgOWNER(mg))
 	Perl_croak(aTHX_ "panic: magic_mutexfree");
     MUTEX_DESTROY(MgMUTEXP(mg));