diff --git a/make/linux-rpm.mk b/make/linux-rpm.mk
index a3672090..475dc219 100644
--- a/make/linux-rpm.mk
+++ b/make/linux-rpm.mk
@@ -35,6 +35,7 @@ BASE                 = $(KERNEL_BASE)-$(KERNEL_VERSION)-$(KERNEL_RELEASE)
 BASE_RUN             = $(KERNEL_BASE)-run-$(KERNEL_VERSION)-$(KERNEL_RELEASE)
 BASE_DEVEL           = $(KERNEL_BASE)-devel-$(KERNEL_VERSION)-$(KERNEL_RELEASE)
 
+KERNEL_TGZ           = $(notdir $(KERNEL_PKG))
 F_SPEC               = $(BASE).spec
 F_TGZ                = $(BASE).tar.gz
 F_SPM                = $(BASE).src.rpm
@@ -64,9 +65,11 @@ export KERNEL_INSTALL_PREFIX
 all: rpm
 
 # file rules
-$(KERNEL_PKG):
-	ftp -a ftp.kernel.org:/pub/linux/kernel/v$(basename $(KERNEL_VERSION))/$(notdir $(KERNEL_PKG))
-	cp $(notdir $(KERNEL_PKG)) $@
+$(KERNEL_TGZ):
+	ftp -a ftp.kernel.org:/pub/linux/kernel/v$(basename $(KERNEL_VERSION))/$(KERNEL_TGZ)
+
+$(KERNEL_PKG): $(KERNEL_TGZ)
+	install -m 664 $< $@
 
 config-$(KERNEL_VERSION):
 	cp $(shell ls config-$(basename $(KERNEL_VERSION)).* | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]\)$$/\1.\2.0\3/' | sort -g | sed 's/\.0/./; $$ !d') $@