diff --git a/ares.h b/ares.h
index 3b4ff13d..9456a14a 100644
--- a/ares.h
+++ b/ares.h
@@ -317,7 +317,7 @@ CARES_EXTERN void ares_cancel(ares_channel channel);
  * connection.  Use these to specify source IP and/or network device
  * on multi-homed systems.
  */
-CARES_EXTERN void ares_set_local_ip4(ares_channel channel, uint32_t local_ip);
+CARES_EXTERN void ares_set_local_ip4(ares_channel channel, unsigned int local_ip);
 
 /* local_ip6 should be 16 bytes in length */
 CARES_EXTERN void ares_set_local_ip6(ares_channel channel,
diff --git a/ares_private.h b/ares_private.h
index 6f86a3ab..bf21abd8 100644
--- a/ares_private.h
+++ b/ares_private.h
@@ -261,7 +261,7 @@ struct ares_channeldata {
    * them null/zero for no binding.
    */
   char local_dev_name[32];
-  uint32_t local_ip4;
+  unsigned int local_ip4;
   unsigned char local_ip6[16];
 
   int optmask; /* the option bitfield passed in at init time */