diff --git a/dlls/rpcrt4/rpc_transport.c b/dlls/rpcrt4/rpc_transport.c
index 86b4303b445..0db5b6af934 100644
--- a/dlls/rpcrt4/rpc_transport.c
+++ b/dlls/rpcrt4/rpc_transport.c
@@ -29,20 +29,20 @@
 #include <string.h>
 #include <assert.h>
 
-#include <unistd.h>
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
 #include <fcntl.h>
 #include <stdlib.h>
-#ifdef HAVE_SYS_TYPES
 #include <sys/types.h>
-#endif
 #ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
+# include <sys/socket.h>
 #endif
 #ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
+# include <netinet/in.h>
 #endif
 #ifdef HAVE_ARPA_INET_H
-#include <arpa/inet.h>
+# include <arpa/inet.h>
 #endif
 #ifdef HAVE_NETDB_H
 #include <netdb.h>