diff --git a/arch/um/Makefile-x86_64 b/arch/um/Makefile-x86_64
index aa2f7174ebc..baddb5d64ca 100644
--- a/arch/um/Makefile-x86_64
+++ b/arch/um/Makefile-x86_64
@@ -6,7 +6,7 @@ START := 0x60000000
 
 #We #undef __x86_64__ for kernelspace, not for userspace where
 #it's needed for headers to work!
-CFLAGS += -U__$(SUBARCH)__ -fno-builtin $(STUB_CFLAGS)
+CFLAGS += -U__$(SUBARCH)__ -fno-builtin
 USER_CFLAGS += -fno-builtin
 
 ELF_ARCH := i386:x86-64
diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile
index cdf6b6d4a06..4ca2a229da4 100644
--- a/arch/um/sys-i386/Makefile
+++ b/arch/um/sys-i386/Makefile
@@ -16,11 +16,7 @@ semaphore.c-dir = kernel
 highmem.c-dir = mm
 module.c-dir = kernel
 
-STUB_CFLAGS = -Wp,-MD,$(depfile) $(call unprofile,$(USER_CFLAGS))
-
-# _cflags works with kernel files, not with userspace ones, but c_flags does,
-# why ask why?
-$(obj)/stub_segv.o : c_flags = $(STUB_CFLAGS)
+$(obj)/stub_segv.o : _c_flags = $(call unprofile,$(CFLAGS))
 
 subdir- := util
 
diff --git a/arch/um/sys-i386/stub_segv.c b/arch/um/sys-i386/stub_segv.c
index 68aeabe3a65..1e88b275eda 100644
--- a/arch/um/sys-i386/stub_segv.c
+++ b/arch/um/sys-i386/stub_segv.c
@@ -3,8 +3,7 @@
  * Licensed under the GPL
  */
 
-#include <signal.h>
-#include <asm/sigcontext.h>
+#include <asm/signal.h>
 #include <asm/unistd.h>
 #include "uml-config.h"
 #include "sysdep/sigcontext.h"
diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile
index 32bb7d8219f..f0ab574d1e9 100644
--- a/arch/um/sys-x86_64/Makefile
+++ b/arch/um/sys-x86_64/Makefile
@@ -27,11 +27,7 @@ memcpy.S-dir = lib
 thunk.S-dir = lib
 module.c-dir = kernel
 
-STUB_CFLAGS = -Wp,-MD,$(depfile) $(call unprofile,$(USER_CFLAGS))
-
-# _cflags works with kernel files, not with userspace ones, but c_flags does,
-# why ask why?
-$(obj)/stub_segv.o : c_flags = $(STUB_CFLAGS)
+$(obj)/stub_segv.o: _c_flags = $(call unprofile,$(CFLAGS))
 
 subdir- := util
 
diff --git a/arch/um/sys-x86_64/stub_segv.c b/arch/um/sys-x86_64/stub_segv.c
index 161d1fe9c03..65a131b362b 100644
--- a/arch/um/sys-x86_64/stub_segv.c
+++ b/arch/um/sys-x86_64/stub_segv.c
@@ -3,9 +3,10 @@
  * Licensed under the GPL
  */
 
-#include <signal.h>
+#include <asm/signal.h>
 #include <linux/compiler.h>
 #include <asm/unistd.h>
+#include <asm/ucontext.h>
 #include "uml-config.h"
 #include "sysdep/sigcontext.h"
 #include "sysdep/faultinfo.h"