diff --git a/src/dict.c b/src/dict.c
index 3e01092141509077417fcf5584cff68d47265caf..d3b83d52d27e2e48e17eaa3ef6d532da46422b9f 100644
--- a/src/dict.c
+++ b/src/dict.c
@@ -754,6 +754,8 @@ unsigned long dictScan(dict *d,
     unsigned long s0, s1;
     unsigned long m0, m1;
 
+    if (dictSize(d) == 0) return 0;
+
     if (!dictIsRehashing(d)) {
         t0 = &(d->ht[0]);
         m0 = t0->sizemask;