diff --git a/Makefile.am b/Makefile.am
index ca6be2b..797c2e3 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,9 +1,12 @@
 SUBDIRS = include
 
+ACLOCAL_AMFLAGS = -I m4 --install
 AM_CFLAGS = -I$(top_srcdir)/include
 
 lib_LIBRARIES = libkernaux.a
 
+EXTRA_DIST = m4/.keep
+
 libkernaux_a_SOURCES = \
 	src/arch/i386.S \
 	src/pfa.c
diff --git a/configure.ac b/configure.ac
index c337067..06631b0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5,6 +5,7 @@ AC_INIT([libkernaux],
   [libkernaux],
   [https://github.com/kernelmq/libkernaux])
 
+AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_SRCDIR([src/pfa.c])
 
 AM_INIT_AUTOMAKE([1.9 subdir-objects -Wall -Werror])
diff --git a/m4/.keep b/m4/.keep
new file mode 100644
index 0000000..e69de29