diff --git a/include/jemalloc/internal/emap.h b/include/jemalloc/internal/emap.h
index c4b40142..b51a0c53 100644
--- a/include/jemalloc/internal/emap.h
+++ b/include/jemalloc/internal/emap.h
@@ -27,7 +27,7 @@ struct emap_full_alloc_ctx_s {
 
 extern emap_t emap_global;
 
-bool emap_init(emap_t *emap);
+bool emap_init(emap_t *emap, bool zeroed);
 
 /*
  * Grab the lock or locks associated with the edata or edatas indicated (which
diff --git a/src/emap.c b/src/emap.c
index ae0d3127..200a7828 100644
--- a/src/emap.c
+++ b/src/emap.c
@@ -22,9 +22,9 @@ enum emap_lock_result_e {
 typedef enum emap_lock_result_e emap_lock_result_t;
 
 bool
-emap_init(emap_t *emap) {
+emap_init(emap_t *emap, bool zeroed) {
 	bool err;
-	err = rtree_new(&emap->rtree, true);
+	err = rtree_new(&emap->rtree, zeroed);
 	if (err) {
 		return true;
 	}
diff --git a/src/jemalloc.c b/src/jemalloc.c
index 907235af..e2adffd2 100644
--- a/src/jemalloc.c
+++ b/src/jemalloc.c
@@ -1572,7 +1572,8 @@ malloc_init_hard_a0_locked() {
 	if (base_boot(TSDN_NULL)) {
 		return true;
 	}
-	if (emap_init(&emap_global)) {
+	/* emap_global is static, hence zeroed. */
+	if (emap_init(&emap_global, /* zeroed */ true)) {
 		return true;
 	}
 	if (extent_boot()) {