diff --git a/[refs] b/[refs]
index 78abf3f505da..14372e779805 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8e5cb35a60c8792ffc3ba89ea66ebdd3c2f01cb1
+refs/heads/master: fd7481047882eaa0a692a545d5f8419612ece1b0
diff --git a/trunk/arch/um/Makefile b/trunk/arch/um/Makefile
index ce987266dac6..5b5af95721ab 100644
--- a/trunk/arch/um/Makefile
+++ b/trunk/arch/um/Makefile
@@ -53,9 +53,13 @@ SYS_DIR		:= $(ARCH_DIR)/include/sysdep-$(SUBARCH)
 
 # -Dvmap=kernel_vmap affects everything, and prevents anything from
 # referencing the libpcap.o symbol so named.
+#
+# Same things for in6addr_loopback - found in libc.
 
 CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
-	$(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap
+	$(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
+	-Din6addr_loopback=kernel_in6addr_loopback
+
 AFLAGS += $(ARCH_INCLUDE)
 
 USER_CFLAGS := $(patsubst -I%,,$(CFLAGS))