diff --git a/src/redis.h b/src/redis.h
index 4b5c94dc..de18fef4 100644
--- a/src/redis.h
+++ b/src/redis.h
@@ -683,7 +683,7 @@ extern dictType setDictType;
 extern dictType zsetDictType;
 extern dictType dbDictType;
 extern double R_Zero, R_PosInf, R_NegInf, R_Nan;
-dictType hashDictType;
+extern dictType hashDictType;
 
 /*-----------------------------------------------------------------------------
  * Functions prototypes