diff --git a/cmake/FindFFTW3.cmake b/cmake/FindFFTW3.cmake
index d067620e17fba5434464ca7478ca4faf90513b09..0466a9ac953ca7943a744b657ebd27c78385c103 100644
--- a/cmake/FindFFTW3.cmake
+++ b/cmake/FindFFTW3.cmake
@@ -12,6 +12,8 @@ find_library (FFTW3_MPI_LIBRARIES NAMES fftw3_mpi)
 # all listed variables are TRUE
 include (FindPackageHandleStandardArgs)
 find_package_handle_standard_args (FFTW3 DEFAULT_MSG FFTW3_LIBRARIES FFTW3_INCLUDE_DIR)
+set(FPHSA_NAME_MISMATCHED 1)
 find_package_handle_standard_args (FFTW3_MPI DEFAULT_MSG FFTW3_MPI_LIBRARIES FFTW3_MPI_INCLUDE_DIR)
+unset(FPHSA_NAME_MISMATCHED)
 
 mark_as_advanced (FFTW3_LIBRARIES FFTW3_INCLUDE_DIR FFTW3_MPI_LIBRARIES FFTW3_MPI_INCLUDE_DIR)