diff --git a/[refs] b/[refs]
index 503de3de3d51..1b870e90e84f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f2833aef6a0517e933992c8007f330d0df5d9317
+refs/heads/master: 2c51a4bc0233487db81706a0189715a59b18e9d6
diff --git a/trunk/arch/um/Makefile b/trunk/arch/um/Makefile
index fab8121d2b32..c0f712cc7c5f 100644
--- a/trunk/arch/um/Makefile
+++ b/trunk/arch/um/Makefile
@@ -41,7 +41,7 @@ KBUILD_CPPFLAGS += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)
 KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
 	$(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap	\
 	-Din6addr_loopback=kernel_in6addr_loopback \
-	-Din6addr_any=kernel_in6addr_any
+	-Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
 
 KBUILD_AFLAGS += $(ARCH_INCLUDE)