diff --git a/src/redis.h b/src/redis.h
index e4fd47d3..a1468a3b 100644
--- a/src/redis.h
+++ b/src/redis.h
@@ -817,7 +817,7 @@ extern dictType zsetDictType;
 extern dictType clusterNodesDictType;
 extern dictType dbDictType;
 extern double R_Zero, R_PosInf, R_NegInf, R_Nan;
-dictType hashDictType;
+extern dictType hashDictType;
 
 /*-----------------------------------------------------------------------------
  * Functions prototypes