Some fixed from Marcus.
diff --git a/Makefile.am b/Makefile.am
index 8bf4429..ad86eb7 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,5 @@
 SUBDIRS=src examples doc
+ACLOCAL_AMFLAGS=-I m4
 
 pkgconfigdir=$(libdir)/pkgconfig
 pkgconfig_DATA=libmtp.pc