diff --git a/arch/arm/crypto/Makefile b/arch/arm/crypto/Makefile
index 372bf8d..fda4eea 100644
--- a/arch/arm/crypto/Makefile
+++ b/arch/arm/crypto/Makefile
@@ -13,5 +13,3 @@
 
 $(src)/sha256-core.S_shipped: $(src)/sha256-armv4.pl
 	$(call cmd,perl)
-
-.PRECIOUS: $(obj)/sha256-core.S
diff --git a/images/Makefile b/images/Makefile
index c4b2a48..ca0ee2b 100644
--- a/images/Makefile
+++ b/images/Makefile
@@ -111,8 +111,6 @@
 targets += $(patsubst %,%.s,$(pblb-y))
 targets += $(foreach m, $(image-y), $(FILE_$(m)))
 
-SECONDARY: $(addprefix $(obj)/,$(targets))
-
 # Images with full paths
 image-y-path := $(addprefix $(obj)/,$(image-y))
 # File will have a list of images generated
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 3b71949..edfe27e 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -282,3 +282,6 @@
 
 # delete partially updated (i.e. corrupted) files on error
 .DELETE_ON_ERROR:
+
+# do not delete intermediate files automatically
+.SECONDARY: