diff --git a/cmake/FindReadline.cmake b/cmake/FindReadline.cmake
index de9ddc46d..f26911b26 100644
--- a/cmake/FindReadline.cmake
+++ b/cmake/FindReadline.cmake
@@ -66,7 +66,9 @@ check_function_exists(rl_copy_text HAVE_COPY_TEXT)
 check_function_exists(rl_filename_completion_function HAVE_COMPLETION_FUNCTION)
 
 if(NOT HAVE_COMPLETION_FUNCTION)
-  set(CMAKE_REQUIRED_LIBRARIES ${Readline_LIBRARY} ${Termcap_LIBRARY})
+  if (Readline_LIBRARY)
+    set(CMAKE_REQUIRED_LIBRARIES ${Readline_LIBRARY} ${Termcap_LIBRARY})
+  endif(Readline_LIBRARY)
   check_function_exists(rl_copy_text HAVE_COPY_TEXT_TC)
   check_function_exists(rl_filename_completion_function HAVE_COMPLETION_FUNCTION_TC)
   set(HAVE_COMPLETION_FUNCTION ${HAVE_COMPLETION_FUNCTION_TC})