@@ -1234,10 +1234,12 @@
 	])
 	AC_CHECK_HEADERS([arpa/inet.h netdb.h])
 
 	AC_CHECK_MEMBER([struct sockaddr_in6.sin6_addr], [
 		AC_EGREP_CPP(egrep_cpp_yes, [
+			typedef int BOOL;
+
 			#ifdef OF_HAVE_SYS_SOCKET_H
 			# include <sys/socket.h>
 			#endif
 
 			#ifdef _WIN32
@@ -1257,10 +1259,12 @@
 		], [
 			AC_DEFINE(OF_HAVE_IPV6, 1, [Whether we have IPv6])
 		])
 	], [
 	], [
+		typedef int BOOL;
+
 		#ifdef OF_HAVE_NETINET_IN_H
 		# include <netinet/in.h>
 		#endif
 
 		#ifdef _WIN32