diff --git a/src/libosmo-mgcp-client/Makefile.am b/src/libosmo-mgcp-client/Makefile.am
index a2eb2be..3dd21db 100644
--- a/src/libosmo-mgcp-client/Makefile.am
+++ b/src/libosmo-mgcp-client/Makefile.am
@@ -1,6 +1,7 @@
 AM_CPPFLAGS = \
 	$(all_includes) \
 	-I$(top_srcdir)/include \
+	-I$(top_builddir)/include \
 	-I$(top_builddir) \
 	$(NULL)