diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index 246f0e7..a9dd693 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -4,7 +4,7 @@
 #
 
 extra-y := vmlinux.lds
-clean-files := vmlinux.lds.S config.tmp
+clean-files := vmlinux.lds.S
 
 obj-y = checksum.o config.o exec_kern.o exitcode.o \
 	helper.o init_task.o irq.o irq_user.o ksyms.o main.o mem.o mem_user.o \
@@ -34,7 +34,7 @@
 
 include arch/um/scripts/Makefile.rules
 
-targets += config.c
+targets := config.c config.tmp
 
 # Be careful with the below Sed code - sed is pitfall-rich!
 # We use sed to lower build requirements, for "embedded" builders for instance.
diff --git a/arch/um/kernel/tt/Makefile b/arch/um/kernel/tt/Makefile
index 3d5177d..c3faea2 100644
--- a/arch/um/kernel/tt/Makefile
+++ b/arch/um/kernel/tt/Makefile
@@ -4,6 +4,7 @@
 #
 
 extra-y := unmap_fin.o
+targets := unmap.o
 clean-files := unmap_tmp.o
 
 obj-y = exec_kern.o exec_user.o gdb.o ksyms.o mem.o mem_user.o process_kern.o \