diff --git a/src/Makefile.am b/src/Makefile.am
index e55c31c56..bc058ea25 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -71,6 +71,8 @@ AM_CFLAGS = \
 	-I$(top_builddir)/src/modules/jack \
 	-I$(top_srcdir)/src/modules/dbus \
 	-I$(top_builddir)/src/modules/dbus \
+	-I$(top_srcdir)/src/modules/echo-cancel \
+	-I$(top_builddir)/src/modules/echo-cancel \
 	$(PTHREAD_CFLAGS) -D_POSIX_PTHREAD_SEMANTICS \
 	$(LIBSAMPLERATE_CFLAGS) \
 	$(LIBSNDFILE_CFLAGS) \