diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3b3651a9..6cb8f48d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,7 +17,7 @@ mark_as_advanced(FORCE var Kokkos_ENABLE_CUDA_LAMBDA)
 mark_as_advanced(FORCE var BUILD_SHARED_LIBS)
 
 option(USE_STD_PARALLEL_ALG "Use TTB std parallel algorithms" ON)
-option(pFlow_Build_Serial "Build phasicFlow and backends for serial execution" ON)
+option(pFlow_Build_Serial "Build phasicFlow and backends for serial execution" OFF)
 option(pFlow_Build_OpenMP "Build phasicFlow and backends for OpenMP execution" OFF)
 option(pFlow_Build_Cuda   "Build phasicFlow and backends for Cuda execution" OFF)
 
@@ -33,6 +33,7 @@ elseif(pFlow_Build_OpenMP )
 	set(Kokkos_ENABLE_OPENMP ON CACHE BOOL "OpenMP execution" FORCE)
 	set(Kokkos_ENABLE_CUDA OFF CACHE BOOL "Cuda execution" FORCE)
 	set(Kokkos_ENABLE_CUDA_LAMBDA OFF CACHE BOOL "Cuda execution" FORCE)
+	set(Kokkos_DEFAULT_HOST_PARALLEL_EXECUTION_SPACE SERIAL CACHE STRING "" FORCE)
 elseif(pFlow_Build_Cuda)
 	set(Kokkos_ENABLE_SERIAL ON CACHE BOOL "Serial execution" FORCE) 
 	set(Kokkos_ENABLE_OPENMP OFF CACHE BOOL "OpenMP execution" FORCE)