diff --git a/src/video/vid_mga.c b/src/video/vid_mga.c
index 0767f8b3a..95a98521b 100644
--- a/src/video/vid_mga.c
+++ b/src/video/vid_mga.c
@@ -2175,6 +2175,7 @@ mystique_ctrl_write_b(uint32_t addr, uint8_t val, void *priv)
             thread_wait_mutex(mystique->dma.lock);
             WRITE8(addr, mystique->dma.primaddress, val);
             mystique->dma.pri_state = 0;
+            mystique->dma.words_expected = 0;
             thread_release_mutex(mystique->dma.lock);
             break;