diff --git a/drivers/net/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c
index 189b2ec1bac7e1bcac1de2607ca40f8f2dfe9206..c69b70e0a721a073704545cf74cc20d8ec6cde8e 100644
--- a/drivers/net/wireless/b43/dma.c
+++ b/drivers/net/wireless/b43/dma.c
@@ -842,6 +842,9 @@ struct b43_dmaring *b43_setup_dmaring(struct b43_wldev *dev,
 #endif
 
 	if (for_tx) {
+		/* Assumption: B43_TXRING_SLOTS can be divided by TX_SLOTS_PER_FRAME */
+		BUILD_BUG_ON(B43_TXRING_SLOTS % TX_SLOTS_PER_FRAME != 0);
+
 		ring->txhdr_cache = kcalloc(ring->nr_slots / TX_SLOTS_PER_FRAME,
 					    b43_txhdr_size(dev),
 					    GFP_KERNEL);