diff --git a/shared-core/nouveau_dma.c b/shared-core/nouveau_dma.c
index e519dc4..1f46b3f 100644
--- a/shared-core/nouveau_dma.c
+++ b/shared-core/nouveau_dma.c
@@ -121,6 +121,8 @@ nouveau_dma_channel_takedown(struct drm_device *dev)
 	DRM_DEBUG("\n");
 
 	if (dchan->chan) {
+		if (dchan->chan->pushbuf_mem && dchan->chan->pushbuf_mem->map)
+			drm_core_ioremapfree(dchan->chan->pushbuf_mem->map, dev);
 		nouveau_fifo_free(dchan->chan);
 		dchan->chan = NULL;
 	}