diff --git a/docs/reference/gio/Makefile.am b/docs/reference/gio/Makefile.am
index e949dc7b8..08093e8a0 100644
--- a/docs/reference/gio/Makefile.am
+++ b/docs/reference/gio/Makefile.am
@@ -232,8 +232,6 @@ endif
 CLEANFILES ?=
 CLEANFILES += $(man_MANS)
 
-EXTRA_DIST += $(man_MANS)
-
 dist-hook-local: all-local
 
 gio-docs-clean: clean
diff --git a/docs/reference/glib/Makefile.am b/docs/reference/glib/Makefile.am
index b485a9135..dfefa25ff 100644
--- a/docs/reference/glib/Makefile.am
+++ b/docs/reference/glib/Makefile.am
@@ -140,8 +140,6 @@ endif
 CLEANFILES ?=
 CLEANFILES += $(man_MANS)
 
-EXTRA_DIST += $(man_MANS)
-
 dist-hook-local: all-local
 
 glib-docs-clean: clean
diff --git a/docs/reference/gobject/Makefile.am b/docs/reference/gobject/Makefile.am
index 560d2e81b..6efe781e1 100644
--- a/docs/reference/gobject/Makefile.am
+++ b/docs/reference/gobject/Makefile.am
@@ -95,8 +95,6 @@ endif
 CLEANFILES ?=
 CLEANFILES += $(man_MANS)
 
-EXTRA_DIST += $(man_MANS)
-
 dist-hook-local: all-local
 
 gobject-docs-clean: clean