diff --git a/src/radeon_kms.c b/src/radeon_kms.c
index 06c8a47f..5fcd8f0b 100644
--- a/src/radeon_kms.c
+++ b/src/radeon_kms.c
@@ -570,7 +570,11 @@ dirty_region(PixmapDirtyUpdatePtr dirty)
 static void
 redisplay_dirty(PixmapDirtyUpdatePtr dirty, RegionPtr region)
 {
-	ScrnInfoPtr pScrn = xf86ScreenToScrn(dirty->slave_dst->drawable.pScreen);
+#ifdef HAS_DIRTYTRACKING_DRAWABLE_SRC
+	ScrnInfoPtr src_scrn = xf86ScreenToScrn(dirty->src->pScreen);
+#else
+	ScrnInfoPtr src_scrn = xf86ScreenToScrn(dirty->src->drawable.pScreen);
+#endif
 
 	if (RegionNil(region))
 		goto out;
@@ -584,7 +588,7 @@ redisplay_dirty(PixmapDirtyUpdatePtr dirty, RegionPtr region)
 	PixmapSyncDirtyHelper(dirty, region);
 #endif
 
-	radeon_cs_flush_indirect(pScrn);
+	radeon_cs_flush_indirect(src_scrn);
 	if (dirty->slave_dst->master_pixmap)
 	    DamageRegionProcessPending(&dirty->slave_dst->drawable);