From d2ca4bb62d807291f9e21ec57c44373a03a99a5e Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Thu, 3 Apr 2014 22:10:20 +0200
Subject: [PATCH] Return "WRONGTYPE" error on PF* type mismatch.

---
 src/hyperloglog.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/hyperloglog.c b/src/hyperloglog.c
index d32a94be2..02fd2728a 100644
--- a/src/hyperloglog.c
+++ b/src/hyperloglog.c
@@ -464,7 +464,9 @@ int isHLLObjectOrReply(redisClient *c, robj *o) {
     /* If this is a string representing an HLL, the size should match
      * exactly. */
     if (stringObjectLen(o) != REDIS_HLL_SIZE) {
-        addReplyErrorFormat(c, "Key is not a valid HyperLogLog string value.");
+        addReplySds(c,
+            sdsnew("-WRONGTYPE Key is not a valid "
+                   "HyperLogLog string value.\r\n"));
         return REDIS_ERR;
     }
     return REDIS_OK;