diff --git a/src/gromacs/mdlib/nbnxn_ocl/vectype_ops.clh b/src/gromacs/mdlib/nbnxn_ocl/vectype_ops.clh
index e7fa839..431ccf4 100644
--- a/src/gromacs/mdlib/nbnxn_ocl/vectype_ops.clh
+++ b/src/gromacs/mdlib/nbnxn_ocl/vectype_ops.clh
@@ -88,7 +88,7 @@ _INLINE_ void atomicAdd_l_f(volatile __local float *addr, float val)
     do{
         expected.f32 = current.f32;
         next.f32     = expected.f32 + val;
-               current.u32  = atomic_cmpxchg( (volatile __local unsigned int *)addr, expected.u32, next.u32);
+//             current.u32  = atomic_cmpxchg( (volatile __local unsigned int *)addr, expected.u32, next.u32);
     } while( current.u32 != expected.u32 );
 }
 _INLINE_ void atomicAdd_l_f3(__local float3 *addr, float3 val)
@@ -107,7 +107,7 @@ _INLINE_ void atomicAdd_g_f(volatile __global float *addr, float val)
     do{
            expected.f32 = current.f32;
         next.f32     = expected.f32 + val;
-               current.u32  = atomic_cmpxchg( (volatile __global unsigned int *)addr, expected.u32, next.u32);
+//             current.u32  = atomic_cmpxchg( (volatile __global unsigned int *)addr, expected.u32, next.u32);
     } while( current.u32 != expected.u32 );
 }