diff --git a/cmake/Modules/FindKIM-API.cmake b/cmake/Modules/FindKIM-API.cmake
index ac25e9ca64..17c195e62f 100644
--- a/cmake/Modules/FindKIM-API.cmake
+++ b/cmake/Modules/FindKIM-API.cmake
@@ -77,7 +77,7 @@ endif()
 if(KIM-API_INCLUDEDIR)
   _KIMAPI_GET_VERSION(KIM-API_VERSION ${KIM-API_INCLUDEDIR}/KIM_Version.h)
 else()
-  message(FATAL_ERROR "KIM-API_INCLUDEDIR not defined")
+  set(KIM-API_VERSION 0)
 endif()
 
 # handle the QUIETLY and REQUIRED arguments and set KIM-API_FOUND to TRUE