1 files changed, 3 insertions, 0 deletions
diff --git a/xset.c b/xset.c
index 98f552f..95da41b 100644
--- a/xset.c
+++ b/xset.c
@@ -53,6 +53,9 @@ in this Software without prior written authorization from The Open Group.
 #include <ctype.h>
 #include <stdarg.h>
 #include <stdlib.h>
+#ifdef HAVE_USLEEP
+#include <unistd.h>
+#endif
 #include <X11/Xos.h>
 #include <X11/Xfuncs.h>
 #include <X11/Xlib.h>