diff --git a/gstlal/lib/gstlal/Makefile.am b/gstlal/lib/gstlal/Makefile.am
index 75512afc59d9ad28a747a6c6edc1e96f2b100ced..f430dde5a02574ddab213913766ea77785729124 100644
--- a/gstlal/lib/gstlal/Makefile.am
+++ b/gstlal/lib/gstlal/Makefile.am
@@ -1,3 +1,5 @@
+AM_CPPFLAGS = -I..
+
 EXTRA_DIST =
 CLEANFILES =