diff --git a/hw/xfree86/int10/generic.c b/hw/xfree86/int10/generic.c
index 850663b73..9e52305d9 100644
--- a/hw/xfree86/int10/generic.c
+++ b/hw/xfree86/int10/generic.c
@@ -7,6 +7,7 @@
 #include <xorg-config.h>
 #endif
 
+#include <errno.h>
 #include <string.h>
 #include <unistd.h>