diff --git a/src/ctl.c b/src/ctl.c
index 813d5fab..535f1eab 100644
--- a/src/ctl.c
+++ b/src/ctl.c
@@ -1646,7 +1646,9 @@ arena_i_extent_hooks_ctl(tsd_t *tsd, const size_t *mib, size_t miblen,
 	if (arena_ind < narenas_total_get() && (arena =
 	    arena_get(tsd_tsdn(tsd), arena_ind, false)) != NULL) {
 		if (newp != NULL) {
-			extent_hooks_t *old_extent_hooks, *new_extent_hooks;
+			extent_hooks_t *old_extent_hooks;
+			extent_hooks_t *new_extent_hooks
+			    JEMALLOC_CC_SILENCE_INIT(NULL);
 			WRITE(new_extent_hooks, extent_hooks_t *);
 			old_extent_hooks = extent_hooks_set(arena,
 			    new_extent_hooks);