diff --git a/CMakeLists.txt b/CMakeLists.txt
index d9c7c66..59b6705 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,7 +36,7 @@ endif()
 target_link_libraries(waves_2_amr PUBLIC AMReX::amrex)
 
 find_package(FFTW REQUIRED)
-target_link_libraries(waves_2_amr PUBLIC FFTW::FFTW)
+target_link_libraries(waves_2_amr PRIVATE FFTW::FFTW)
 
 add_subdirectory(src)
 add_subdirectory(include)