diff --git a/hw/xfree86/os-support/solaris/sun_bell.c b/hw/xfree86/os-support/solaris/sun_bell.c
index 369103f7b..b3a9bfe7e 100644
--- a/hw/xfree86/os-support/solaris/sun_bell.c
+++ b/hw/xfree86/os-support/solaris/sun_bell.c
@@ -38,6 +38,7 @@
 
 #include "xf86.h"
 #include "xf86Priv.h"
+#include "xf86_OSlib.h"
 
 #define BELL_RATE       48000   /* Samples per second */
 #define BELL_HZ         50      /* Fraction of a second i.e. 1/x */