diff --git a/hw/xfree86/os-support/bus/Sbus.c b/hw/xfree86/os-support/bus/Sbus.c
index 2f0043f4c..ff257a8c7 100644
--- a/hw/xfree86/os-support/bus/Sbus.c
+++ b/hw/xfree86/os-support/bus/Sbus.c
@@ -585,7 +585,7 @@ xf86MapSbusMem(sbusDevicePtr psdp, unsigned long offset, unsigned long size)
 _X_EXPORT void
 xf86UnmapSbusMem(sbusDevicePtr psdp, pointer addr, unsigned long size)
 {
-    unsigned long mask = xf86getpagesize() - 1;
+    unsigned long mask = getpagesize() - 1;
     unsigned long base = (unsigned long)addr & ~mask;
     unsigned long len = (((unsigned long)addr + size + mask) & ~mask) - base;