diff --git a/device-gpu.c b/device-gpu.c
index e39bff4b..f7cbcc24 100644
--- a/device-gpu.c
+++ b/device-gpu.c
@@ -769,7 +769,7 @@ static cl_int queue_diakgcn_kernel(_clState *clState, dev_blk_ctx *blk)
 		nonces[i] = blk->nonce + i;
 	CL_SET_VARG(vwidth, nonces);
 
-	CL_SET_BLKARG(PreVal4);
+	CL_SET_BLKARG(PreVal4_2);
 	CL_SET_BLKARG(cty_h);
 	CL_SET_BLKARG(cty_d);
 	CL_SET_BLKARG(PreVal0);