diff --git a/hw/xfree86/os-support/linux/lnx_bell.c b/hw/xfree86/os-support/linux/lnx_bell.c
index 93ad680d7..702dfa675 100644
--- a/hw/xfree86/os-support/linux/lnx_bell.c
+++ b/hw/xfree86/os-support/linux/lnx_bell.c
@@ -32,6 +32,7 @@
 
 #include "xf86.h"
 #include "xf86Priv.h"
+#include "xf86_OSproc.h"
 
 _X_EXPORT void
 xf86OSRingBell(int loudness, int pitch, int duration)