diff -ru GraphicsMagick-1.3.35.orig/magick/studio.h GraphicsMagick-1.3.35/magick/studio.h
--- GraphicsMagick-1.3.35.orig/magick/studio.h	2020-02-23 16:39:56.000000000 +0100
+++ GraphicsMagick-1.3.35/magick/studio.h	2020-11-24 12:39:58.348234453 +0100
@@ -232,7 +232,7 @@
 #endif
 
 #if defined(HAVE_POLL)
-# include <sys/poll.h>
+# include <poll.h>
 #endif
 
 /*