diff --git a/src/libipsec/Makefile.am b/src/libipsec/Makefile.am
index b9ae6d336..ce07e3cad 100644
--- a/src/libipsec/Makefile.am
+++ b/src/libipsec/Makefile.am
@@ -7,7 +7,9 @@ esp_packet.c esp_packet.h
 
 libipsec_la_LIBADD =
 
-INCLUDES = -I$(top_srcdir)/src/libstrongswan
+INCLUDES = \
+	-I$(top_srcdir)/src/libstrongswan \
+	-I$(top_srcdir)/src/libhydra
 
 EXTRA_DIST = Android.mk