diff --git a/libraries/libldap/os-ip.c b/libraries/libldap/os-ip.c
index 60aa94ae3f..7859aa75e3 100644
--- a/libraries/libldap/os-ip.c
+++ b/libraries/libldap/os-ip.c
@@ -316,7 +316,7 @@ ldap_int_poll(
 		/* This means the connection failed */
 		if ( FD_ISSET(s, &efds) ) {
 			int so_errno;
-			int dummy = sizeof(so_errno);
+			ber_socklen_t dummy = sizeof(so_errno);
 			if ( getsockopt( s, SOL_SOCKET, SO_ERROR,
 				(char *) &so_errno, &dummy ) == AC_SOCKET_ERROR || !so_errno )
 			{