diff --git a/OpenCL/m07400.cl b/OpenCL/m07400.cl
index e7da21d2a..b4846481b 100644
--- a/OpenCL/m07400.cl
+++ b/OpenCL/m07400.cl
@@ -110,7 +110,7 @@ void sha256_transform (const u32 w[16], u32 digest[8])
 
   ROUND_STEP (0);
 
-  #pragma unroll
+  //#pragma unroll
   for (int i = 16; i < 64; i += 16)
   {
     ROUND_EXPAND (); ROUND_STEP (i);