--- configure.ac
+++ configure.ac
@@ -17,7 +17,6 @@ AC_USE_SYSTEM_EXTENSIONS
 LT_INIT
 AC_PROG_CC
 AC_PROG_CXX
-AC_CONFIG_MACRO_DIR([m4])
 # AC_PROG_LIBTOOL
 
 # For Gnulib relocatable-prog