diff --git a/configure.ac b/configure.ac
index becf42fd..edf7f366 100644
--- a/configure.ac
+++ b/configure.ac
@@ -92,7 +92,12 @@ AC_TYPE_UINT64_T
 # ----------------------------------------------------------------------
 AC_FUNC_CLOSEDIR_VOID
 AC_FUNC_STAT
-AC_CHECK_FUNCS([faccessat fstatat memmove openat readlinkat strdup strncasecmp strstr])
+AC_CHECK_FUNCS([\
+   faccessat\
+   fstatat\
+   openat\
+   readlinkat\
+])
 
 AC_SEARCH_LIBS([dlopen], [dl dld])