diff --git a/include/curl/multi.h b/include/curl/multi.h
index 9209912f24711e3bac7e2008dc74526045638d56..4d7e0d9004eeb4df2a7a167503bdf9da7ef8fb19 100644
--- a/include/curl/multi.h
+++ b/include/curl/multi.h
@@ -54,7 +54,10 @@
 #if defined(WIN32) && !defined(__GNUC__) || defined(__MINGW32__)
 #include <winsock.h>
 #else
+#ifndef __hpux
+/* HP-UX systems version 9, 10 and 11 lack this header */
 #include <sys/select.h>
+#endif
 #include <sys/socket.h>
 #include <sys/time.h>
 #include <sys/types.h>