diff --git a/hw/xfree86/dri2/dri2.c b/hw/xfree86/dri2/dri2.c
index d2664b1cb..d5273877e 100644
--- a/hw/xfree86/dri2/dri2.c
+++ b/hw/xfree86/dri2/dri2.c
@@ -342,6 +342,17 @@ DRI2Connect(ScreenPtr pScreen, int *fd, const char **driverName,
     return TRUE;
 }
 
+Bool
+DRI2AuthConnection(ScreenPtr pScreen, drm_magic_t magic)
+{
+    DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
+
+    if (ds == NULL || drmAuthMagic(ds->fd, magic))
+	return FALSE;
+
+    return TRUE;
+}
+
 unsigned int
 DRI2GetPixmapHandle(PixmapPtr pPixmap, unsigned int *flags)
 {
diff --git a/hw/xfree86/dri2/dri2.h b/hw/xfree86/dri2/dri2.h
index a31908508..126087a2f 100644
--- a/hw/xfree86/dri2/dri2.h
+++ b/hw/xfree86/dri2/dri2.h
@@ -58,6 +58,8 @@ Bool DRI2Connect(ScreenPtr pScreen,
 		 const char **driverName,
 		 unsigned int *sareaHandle);
 
+Bool DRI2AuthConnection(ScreenPtr pScreen, drm_magic_t magic);
+
 unsigned int DRI2GetPixmapHandle(PixmapPtr pPixmap,
 				 unsigned int *flags);