diff --git a/repos/libports/lib/mk/libc-net.mk b/repos/libports/lib/mk/libc-net.mk
index 9bcb9ba065..29aed822be 100644
--- a/repos/libports/lib/mk/libc-net.mk
+++ b/repos/libports/lib/mk/libc-net.mk
@@ -23,8 +23,8 @@ SRC_C += base64.c
 
 include $(REP_DIR)/lib/mk/libc-common.inc
 
-INC_DIR += $(REP_DIR)/include/libc
-INC_DIR += $(REP_DIR)/include/libc/sys
+INC_DIR += $(LIBC_REP_DIR)/include/libc
+INC_DIR += $(LIBC_REP_DIR)/include/libc/sys
 INC_DIR += $(LIBC_PORT_DIR)/include/libc/sys
 
 # needed for name6.c, contains res_private.h
diff --git a/repos/libports/lib/mk/libc-rpc.mk b/repos/libports/lib/mk/libc-rpc.mk
index a4c3647f66..6512544784 100644
--- a/repos/libports/lib/mk/libc-rpc.mk
+++ b/repos/libports/lib/mk/libc-rpc.mk
@@ -6,7 +6,7 @@ SRC_C = bindresvport.c
 
 include $(REP_DIR)/lib/mk/libc-common.inc
 
-INC_DIR += $(REP_DIR)/include/libc/sys
+INC_DIR += $(LIBC_REP_DIR)/include/libc/sys
 INC_DIR += $(LIBC_PORT_DIR)/include/libc/sys
 
 vpath %.c $(LIBC_RPC_DIR)