diff -burN ITK-5.0.0.orig/CMake/FindFFTW.cmake ITK-5.0.0/CMake/FindFFTW.cmake
--- ITK-5.0.0.orig/CMake/FindFFTW.cmake	2019-05-22 17:54:36.000000000 +0200
+++ ITK-5.0.0/CMake/FindFFTW.cmake	2019-06-24 16:45:46.316235664 +0200
@@ -59,7 +59,7 @@
   if(ITK_USE_CUFFTW)
     find_path(CUFFTW_INCLUDE_PATH cufftw.h ${FFTW_INC_SEARCHPATH})
   else()
-    find_path(FFTW_INCLUDE_PATH fftw3.h ${FFTW_INC_SEARCHPATH})
+    find_path(FFTW_INCLUDE_PATH fftw3.h NO_DEFAULT_PATH)
   endif()
 
   if(FFTW_INCLUDE_PATH)
@@ -183,7 +189,7 @@
     if(ITK_USE_FFTWD)
       mark_as_advanced(FFTWD_BASE_LIB FFTWD_THREADS_LIB FFTWD_LIBRARIES)
-      find_library(FFTWD_BASE_LIB fftw3 ${FFTW_LIB_SEARCHPATH}) #Double Precision Lib
-      find_library(FFTWD_THREADS_LIB fftw3_threads ${FFTW_LIB_SEARCHPATH}) #Double Precision Lib only if compiled with threads support
+      find_library(FFTWD_BASE_LIB fftw3 ${FFTW_LIB_SEARCHPATH}  NO_DEFAULT_PATH) #Double Precision Lib
+      find_library(FFTWD_THREADS_LIB fftw3_threads ${FFTW_LIB_SEARCHPATH}  NO_DEFAULT_PATH) #Double Precision Lib only if compiled with threads support
 
       if(FFTWD_BASE_LIB)
         set(FFTWD_FOUND 1)
@@ -203,7 +209,7 @@
     if(ITK_USE_FFTWF)
       mark_as_advanced(FFTWF_BASE_LIB FFTWF_THREADS_LIB FFTWF_LIBRARIES)
-      find_library(FFTWF_BASE_LIB fftw3f ${FFTW_LIB_SEARCHPATH}) #Single Precision Lib
-      find_library(FFTWF_THREADS_LIB fftw3f_threads ${FFTW_LIB_SEARCHPATH}) #Single Precision Lib only if compiled with threads support
+      find_library(FFTWF_BASE_LIB fftw3f ${FFTW_LIB_SEARCHPATH}  NO_DEFAULT_PATH) #Single Precision Lib
+      find_library(FFTWF_THREADS_LIB fftw3f_threads ${FFTW_LIB_SEARCHPATH}  NO_DEFAULT_PATH) #Single Precision Lib only if compiled with threads support
 
       if(FFTWF_BASE_LIB)
         set(FFTWF_FOUND 1)