diff --git a/xmrstak/backend/amd/amd_gpu/opencl/cryptonight.cl b/xmrstak/backend/amd/amd_gpu/opencl/cryptonight.cl
index 2c775e77e1dca5fd4cd33e2b1de88b235dc114d9..79828d76fbb44b13a0229494b3728c9b8003863a 100644
--- a/xmrstak/backend/amd/amd_gpu/opencl/cryptonight.cl
+++ b/xmrstak/backend/amd/amd_gpu/opencl/cryptonight.cl
@@ -1248,7 +1248,6 @@ __kernel void Groestl(__global ulong *states, __global uint *BranchBuf, __global
 
         State[7] = 0x0001000000000000UL;
 
-        #pragma unroll 4
         for(uint i = 0; i < 4; ++i)
         {
             volatile ulong H[8], M[8];