2 files changed, 9 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/common/dri_util.c b/src/mesa/drivers/dri/common/dri_util.c
index e20c4fe5fa..b88592313e 100644
--- a/src/mesa/drivers/dri/common/dri_util.c
+++ b/src/mesa/drivers/dri/common/dri_util.c
@@ -47,6 +47,14 @@ static const int empty_attribute_list[1] = { None };
 
 
 /**
+ * This is just a token extension used to signal that the driver
+ * supports setting a read drawable.
+ */
+const __DRIextension driReadDrawableExtension = {
+    __DRI_READ_DRAWABLE
+};
+
+/**
  * Cached copy of the internal API version used by libGL and the client-side
  * DRI driver.
  */
diff --git a/src/mesa/drivers/dri/common/dri_util.h b/src/mesa/drivers/dri/common/dri_util.h
index e43a5b752e..91992a9a24 100644
--- a/src/mesa/drivers/dri/common/dri_util.h
+++ b/src/mesa/drivers/dri/common/dri_util.h
@@ -76,6 +76,7 @@ extern __GLcontextModes *__driDriverInitScreen(__DRIscreenPrivate *psp);
 /**
  * Extensions.
  */
+extern const __DRIextension driReadDrawableExtension;
 extern const __DRIcopySubBufferExtension driCopySubBufferExtension;
 extern const __DRIswapControlExtension driSwapControlExtension;
 extern const __DRIframeTrackingExtension driFrameTrackingExtension;