diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index 8eefd793cc82..d0b16e5e4ee5 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -135,7 +135,7 @@
 #define OMAP_ALIGN_MASK		(sizeof(u32)-1)
 #define OMAP_ALIGNED		__attribute__((aligned(sizeof(u32))))
 
-#define BUFLEN			PAGE_SIZE
+#define BUFLEN			SHA512_BLOCK_SIZE
 #define OMAP_SHA_DMA_THRESHOLD	256
 
 struct omap_sham_dev;