diff --git a/hw/xfree86/parser/DRI.c b/hw/xfree86/parser/DRI.c
index ad053f746..6be32d7ea 100644
--- a/hw/xfree86/parser/DRI.c
+++ b/hw/xfree86/parser/DRI.c
@@ -31,6 +31,7 @@
 #include <xorg-config.h>
 #endif
 
+#include "os.h"
 #include "xf86Parser.h"
 #include "xf86tokens.h"
 #include "Configint.h"
diff --git a/hw/xfree86/parser/Extensions.c b/hw/xfree86/parser/Extensions.c
index b5ba72e5f..a6fcb56f0 100644
--- a/hw/xfree86/parser/Extensions.c
+++ b/hw/xfree86/parser/Extensions.c
@@ -35,6 +35,7 @@
 #include <xorg-config.h>
 #endif
 
+#include "os.h"
 #include "xf86Parser.h"
 #include "xf86tokens.h"
 #include "Configint.h"