diff --git a/gpu.cmake b/gpu.cmake
index ee456d7fadcbeef0be9f5192cec91b886d836915..5b175ca2a5fe7d289bd948e905ada612413333d2 100644
--- a/gpu.cmake
+++ b/gpu.cmake
@@ -25,8 +25,6 @@ add_subdirectory(src/gpu/GridGenerator)
 IF (BUILD_VF_GPU)
     add_subdirectory(src/gpu/VirtualFluids_GPU)
 
-    add_subdirectory(src/gpu/VirtualFluids_GPU)
-
     add_subdirectory(apps/gpu/LBM/DrivenCavity)
     add_subdirectory(apps/gpu/LBM/SphereGPU)
     add_subdirectory(apps/gpu/LBM/BoundaryLayer)