diff --git a/lib/libc/stdlib/malloc.c b/lib/libc/stdlib/malloc.c
index 5abcca920d72..de7a4c0b25b6 100644
--- a/lib/libc/stdlib/malloc.c
+++ b/lib/libc/stdlib/malloc.c
@@ -250,6 +250,7 @@ __FBSDID("$FreeBSD$");
 #endif
 #ifdef __powerpc__
 #  define LG_QUANTUM		4
+#  define TLS_MODEL		/* default */
 #endif
 #ifdef __s390x__
 #  define LG_QUANTUM		4