diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 262857de16..e8afb6fb56 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -123,15 +123,14 @@ if(ENABLE_USER-OMP OR ENABLE_KOKKOS OR ENABLE_USER-INTEL)
 endif()
 
 if(ENABLE_KSPACE)
-  foreach(FFT FFTW3 MKL FFTW2)
-    find_package(${FFT})
-    if(${FFT}_FOUND)
-      add_definitions(-DFFT_${FFT})
-      include_directories(${${FFT}_INCLUDE_DIRS})
-      list(APPEND LAMMPS_LINK_LIBS ${${FFT}_LIBRARIES})
-      break()
-    endif()
-  endforeach()
+  set(FFT "KISSFFT" CACHE STRING "FFT library for KSPACE package")
+  set_property(CACHE FFT PROPERTY STRINGS KISSFFT FFTW3 MKL FFTW2)
+  if(NOT FFT STREQUAL "KISSFFT")
+    find_package(${FFT} REQUIRED)
+    add_definitions(-DFFT_${FFT})
+    include_directories(${${FFT}_INCLUDE_DIRS})
+    list(APPEND LAMMPS_LINK_LIBS ${${FFT}_LIBRARIES})
+  endif()
   set(PACK_OPTIMIZATION "PACK_ARRAY" CACHE STRING "Optimization for FFT")
   set_property(CACHE LAMMPS_SIZE_LIMIT PROPERTY STRINGS PACK_ARRAY PACK_POINTER PACK_MEMCPY)
   if(NOT PACK_OPTIMIZATION STREQUAL "PACK_ARRAY")