diff --git a/gas/Makefile.in b/gas/Makefile.in
index 8319181b472..e4386b38621 100644
--- a/gas/Makefile.in
+++ b/gas/Makefile.in
@@ -2231,7 +2231,7 @@ de-stage3:
 
 doc/asconfig.texi: doc/$(CONFIG).texi doc/$(am__dirstamp)
 	$(AM_V_at)rm -f doc/asconfig.texi
-	$(AM_V_GEN)cp $(srcdir)/doc/$(CONFIG).texi doc/asconfig.texi
+	$(AM_V_GEN)cp -p $(srcdir)/doc/$(CONFIG).texi doc/asconfig.texi
 	$(AM_V_at)chmod u+w doc/asconfig.texi
 
 # Maintenance
diff --git a/gas/doc/.dirstamp b/gas/doc/.dirstamp
deleted file mode 100644
index e69de29bb2d..00000000000
diff --git a/gas/doc/local.mk b/gas/doc/local.mk
index f611a50913c..de13e3ca8b8 100644
--- a/gas/doc/local.mk
+++ b/gas/doc/local.mk
@@ -41,7 +41,7 @@ TEXI2DVI = texi2dvi -I "$(srcdir)/%D%" -I %D% -I "$(srcdir)/../libiberty" \
 
 %D%/asconfig.texi: %D%/$(CONFIG).texi %D%/$(am__dirstamp)
 	$(AM_V_at)rm -f %D%/asconfig.texi
-	$(AM_V_GEN)cp $(srcdir)/%D%/$(CONFIG).texi %D%/asconfig.texi
+	$(AM_V_GEN)cp -p $(srcdir)/%D%/$(CONFIG).texi %D%/asconfig.texi
 	$(AM_V_at)chmod u+w %D%/asconfig.texi
 
 CPU_DOCS = \
-- 
2.39.2