diff --git a/src/cuda/communication/UniformGPUScheme.h b/src/cuda/communication/UniformGPUScheme.h
index b22a3be6c274fcec274b7cf5eb3bc08266849da1..0dda96a480a154a4f400e7d1e425cc49eb477472 100644
--- a/src/cuda/communication/UniformGPUScheme.h
+++ b/src/cuda/communication/UniformGPUScheme.h
@@ -33,7 +33,6 @@
 #include "cuda/communication/CustomMemoryBuffer.h"
 #include "cuda/ParallelStreams.h"
 
-#include <chrono>
 #include <thread>
 
 namespace walberla {
diff --git a/src/cuda/communication/UniformGPUScheme.impl.h b/src/cuda/communication/UniformGPUScheme.impl.h
index 51ab70d72d1dcb1fdeed0847dd84d6a60a2be3ef..b39d9d054a7cf4fad71b328b8f5dbc54ca06a959 100644
--- a/src/cuda/communication/UniformGPUScheme.impl.h
+++ b/src/cuda/communication/UniformGPUScheme.impl.h
@@ -139,8 +139,6 @@ UniformGPUScheme<Stencil>::UniformGPUScheme( weak_ptr_wrapper <StructuredBlockFo
          auto parallelSection = parallelSectionManager_.parallelSection( stream );
          for( auto recvInfo = bufferSystemCPU_.begin(); recvInfo != bufferSystemCPU_.end(); ++recvInfo )
          {
-            using namespace std::chrono_literals;
-            std::this_thread::sleep_for( 1ms );
             auto &gpuBuffer = bufferSystemGPU_.sendBuffer( recvInfo.rank());
 
             gpuBuffer.clear();