diff --git a/src/ziplist.c b/src/ziplist.c
index f1069e41..5254423d 100644
--- a/src/ziplist.c
+++ b/src/ziplist.c
@@ -870,6 +870,10 @@ int main(int argc, char **argv) {
     unsigned int elen;
     long long value;
 
+    /* If an argument is given, use it as the random seed. */
+    if (argc == 2)
+        srand(atoi(argv[1]));
+
     zl = createIntList();
     ziplistRepr(zl);