diff --git a/usr.bin/make/make.1 b/usr.bin/make/make.1
index a6b0dd4f5c01..da98e681b33c 100644
--- a/usr.bin/make/make.1
+++ b/usr.bin/make/make.1
@@ -1189,7 +1189,10 @@ list of dependencies
 .It obj
 object directory
 .It Pa sys.mk
-system makefile
+system makefile (processed before any other file, including
+.Pa makefile
+and
+.Pa Makefile )
 .It Pa /usr/share/mk
 system makefile directory
 .It /usr/share/doc/psd/12.make