diff --git a/configure.ac b/configure.ac
index b4dfbc1c..4df3961f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -99,6 +99,7 @@ AC_CHECK_FUNC([fcntl],,    AC_MSG_ERROR("Could not find fcntl"))
 AC_CHECK_FUNC([setlocale],,AC_MSG_ERROR("Could not find setlocale"))
 AC_CHECK_FUNC([atexit],,   AC_MSG_ERROR("Could not find atexit in c library"))
 AC_CHECK_FUNC([glob],,     AC_MSG_ERROR("Could not find glob in c library"))
+AC_CHECK_FUNC([strchrnul],,AC_MSG_ERROR("Could not find strchrnul function in c library (gnu extension)"))
 
 AC_CHECK_HEADER([math.h],, AC_MSG_ERROR("Could not find math.h header file"))
 AC_SEARCH_LIBS([floor],[m],,      AC_MSG_ERROR("Could not find floor in math library"))