diff --git a/src/plugins/dbus/Makefile.am b/src/plugins/dbus/Makefile.am
index 3e92113..208f0ad 100644
--- a/src/plugins/dbus/Makefile.am
+++ b/src/plugins/dbus/Makefile.am
@@ -31,7 +31,7 @@
 
 MAINTAINERCLEANFILES	= Makefile.in
 
-INCLUDES		= -I$(top_srcdir)/include
+AM_CPPFLAGS		= -I$(top_srcdir)/include
 
 EXTRA_LTLIBRARIES	= libintf_dbus.la
 noinst_LTLIBRARIES	= @INTF_DBUS_LIB@