Index: uspace/srv/net/tcp/Makefile
===================================================================
--- uspace/srv/net/tcp/Makefile	(revision 779541be88a7692182b80bde3b7fae49f3832431)
+++ uspace/srv/net/tcp/Makefile	(revision 2c4bb828a93021583aec2fd19982a935378d0df4)
@@ -28,4 +28,11 @@
 
 USPACE_PREFIX = ../../..
+
+LIBS = \
+	$(LIBNETTL_PREFIX)/libnettl.a
+
+EXTRA_CFLAGS += \
+	-I$(LIBNETTL_PREFIX)/include
+
 BINARY = tcp