diff --git a/cmake/CheckIncludeFiles.cmake b/cmake/CheckIncludeFiles.cmake
index 89b40ad..cc258ba 100644
--- a/cmake/CheckIncludeFiles.cmake
+++ b/cmake/CheckIncludeFiles.cmake
@@ -73,4 +73,7 @@ CHECK_INCLUDE_FILES (termio.h HAVE_TERMIO_H)
 CHECK_INCLUDE_FILES (termios.h HAVE_TERMIOS_H)
 CHECK_INCLUDE_FILES (unistd.h HAVE_UNISTD_H)
 CHECK_INCLUDE_FILES (utime.h HAVE_UTIME_H)
-CHECK_INCLUDE_FILES (ucontext.h HAVE_UCONTEXT_H)
+CHECK_INCLUDE_FILES (ucontext.h HAVE_UCONTEXT_HEADER)
+IF(HAVE_UCONTEXT_HEADER)
+  CHECK_FUNCTION_EXISTS(makecontext HAVE_UCONTEXT_H)
+ENDIF(HAVE_UCONTEXT_HEADER)