diff --git a/erlang.mk b/erlang.mk
index c203b79..d0b9613 100644
--- a/erlang.mk
+++ b/erlang.mk
@@ -5073,7 +5073,7 @@ asciidoc-manual:
 	for s in $(MAN_SECTIONS); do \
 		mkdir -p doc/man$$s/ ; \
 		mv doc/src/manual/*.$$s doc/man$$s/ ; \
-		gzip doc/man$$s/*.$$s ; \
+		gzip -n doc/man$$s/*.$$s ; \
 	done
 
 install-docs:: install-asciidoc
