diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 68d0134bd..29b36c574 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -335,7 +335,8 @@ cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
 # ---------------------------------------------------------------------------
 
 quiet_cmd_gzip = GZIP    $@
-      cmd_gzip = cat $(real-prereqs) | $(KGZIP) -n -f -9 > $@
+      cmd_gzip = cat $(real-prereqs) | $(KGZIP) -n -f -9 > $@ && \
+		( which advdef > /dev/null && advdef -z4 $@ ; true )
 
 # DTC
 # ---------------------------------------------------------------------------