diff --git a/hircluster.c b/hircluster.c
index 403be41..55aad0a 100644
--- a/hircluster.c
+++ b/hircluster.c
@@ -2564,11 +2564,12 @@ static int command_pre_fragment(redisClusterContext *cc, struct cmd *command,
 
     key_count = hiarray_n(command->keys);
 
-    sub_commands = hi_zalloc(REDIS_CLUSTER_SLOTS * sizeof(*sub_commands));
+    sub_commands = hi_malloc(REDIS_CLUSTER_SLOTS * sizeof(*sub_commands));
     if (sub_commands == NULL) {
         __redisClusterSetError(cc, REDIS_ERR_OOM, "Out of memory");
         goto done;
     }
+    memset(sub_commands, 0, REDIS_CLUSTER_SLOTS * sizeof(*sub_commands));
 
     command->frag_seq = hi_malloc(key_count * sizeof(*command->frag_seq));
     if (command->frag_seq == NULL) {
@@ -2662,12 +2663,14 @@ static int command_pre_fragment(redisClusterContext *cc, struct cmd *command,
             sub_command->clen += 13 + num_str_len;
 
             sub_command->cmd =
-                hi_zalloc(sub_command->clen * sizeof(*sub_command->cmd));
+                hi_malloc(sub_command->clen * sizeof(*sub_command->cmd));
             if (sub_command->cmd == NULL) {
                 __redisClusterSetError(cc, REDIS_ERR_OOM, "Out of memory");
                 slot_num = -1;
                 goto done;
             }
+            memset(sub_command->cmd, 0,
+                   sub_command->clen * sizeof(*sub_command->cmd));
 
             sub_command->cmd[idx++] = '*';
             memcpy(sub_command->cmd + idx, num_str, num_str_len);
@@ -2704,12 +2707,14 @@ static int command_pre_fragment(redisClusterContext *cc, struct cmd *command,
             sub_command->clen += 12 + num_str_len;
 
             sub_command->cmd =
-                hi_zalloc(sub_command->clen * sizeof(*sub_command->cmd));
+                hi_malloc(sub_command->clen * sizeof(*sub_command->cmd));
             if (sub_command->cmd == NULL) {
                 __redisClusterSetError(cc, REDIS_ERR_OOM, "Out of memory");
                 slot_num = -1;
                 goto done;
             }
+            memset(sub_command->cmd, 0,
+                   sub_command->clen * sizeof(*sub_command->cmd));
 
             sub_command->cmd[idx++] = '*';
             memcpy(sub_command->cmd + idx, num_str, num_str_len);
@@ -2746,12 +2751,14 @@ static int command_pre_fragment(redisClusterContext *cc, struct cmd *command,
             sub_command->clen += 15 + num_str_len;
 
             sub_command->cmd =
-                hi_zalloc(sub_command->clen * sizeof(*sub_command->cmd));
+                hi_malloc(sub_command->clen * sizeof(*sub_command->cmd));
             if (sub_command->cmd == NULL) {
                 __redisClusterSetError(cc, REDIS_ERR_OOM, "Out of memory");
                 slot_num = -1;
                 goto done;
             }
+            memset(sub_command->cmd, 0,
+                   sub_command->clen * sizeof(*sub_command->cmd));
 
             sub_command->cmd[idx++] = '*';
             memcpy(sub_command->cmd + idx, num_str, num_str_len);
@@ -2790,12 +2797,14 @@ static int command_pre_fragment(redisClusterContext *cc, struct cmd *command,
             sub_command->clen += 13 + num_str_len;
 
             sub_command->cmd =
-                hi_zalloc(sub_command->clen * sizeof(*sub_command->cmd));
+                hi_malloc(sub_command->clen * sizeof(*sub_command->cmd));
             if (sub_command->cmd == NULL) {
                 __redisClusterSetError(cc, REDIS_ERR_OOM, "Out of memory");
                 slot_num = -1;
                 goto done;
             }
+            memset(sub_command->cmd, 0,
+                   sub_command->clen * sizeof(*sub_command->cmd));
 
             sub_command->cmd[idx++] = '*';
             memcpy(sub_command->cmd + idx, num_str, num_str_len);
diff --git a/hiutil.c b/hiutil.c
index fd85cfb..fae6f6f 100644
--- a/hiutil.c
+++ b/hiutil.c
@@ -230,17 +230,6 @@ int _uint_len(uint32_t num) {
     return n;
 }
 
-void *_hi_zalloc(size_t size) {
-    void *p;
-
-    p = hi_malloc(size);
-    if (p != NULL) {
-        memset(p, 0, size);
-    }
-
-    return p;
-}
-
 void hi_stacktrace(int skip_count) {
     if (skip_count > 0) {
     }
diff --git a/hiutil.h b/hiutil.h
index 6c3f0e5..c4ba6f4 100644
--- a/hiutil.h
+++ b/hiutil.h
@@ -153,13 +153,6 @@ int hi_valid_port(int n);
 
 int _uint_len(uint32_t num);
 
-/*
- * Memory allocation wrapper.
- */
-#define hi_zalloc(_s) _hi_zalloc((size_t)(_s))
-
-void *_hi_zalloc(size_t size);
-
 #ifndef WIN32
 /*
  * Wrappers to send or receive n byte message on a blocking