diff --git a/arch/um/Makefile b/arch/um/Makefile
index 3f073902351f..4a375bbac109 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -140,7 +140,8 @@ endef
 #When cleaning we don't include .config, so we don't include
 #TT or skas makefiles and don't clean skas_ptregs.h.
 CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \
-	$(GEN_HEADERS) $(ARCH_DIR)/include/skas_ptregs.h
+	$(GEN_HEADERS) $(ARCH_DIR)/include/skas_ptregs.h \
+	$(ARCH_DIR)/include/user_constants.h
 
 MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \
 	$(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os \