diff --git a/lib/layouts/aapaper.inc b/lib/layouts/aapaper.inc
index 9c61410de9..3f99a4e36c 100644
--- a/lib/layouts/aapaper.inc
+++ b/lib/layouts/aapaper.inc
@@ -23,6 +23,8 @@ Style Subtitle
 	  Size                Normal
 	  Series              Bold
 	EndFont
+	DocBookTag            subtitle
+	DocBookInInfo         maybe
 End
 
 
diff --git a/lib/layouts/acm-sigs.inc b/lib/layouts/acm-sigs.inc
index 70a357d5dd..4a0b8973a6 100644
--- a/lib/layouts/acm-sigs.inc
+++ b/lib/layouts/acm-sigs.inc
@@ -26,6 +26,8 @@ Style Subtitle
 		Size   Large
 		Shape  Italic
 	EndFont
+	DocBookTag            subtitle
+	DocBookInInfo         maybe
 End
 
 Style Terms        
diff --git a/lib/layouts/acmart.layout b/lib/layouts/acmart.layout
index 7e0e85b68d..3298a328ba 100644
--- a/lib/layouts/acmart.layout
+++ b/lib/layouts/acmart.layout
@@ -168,6 +168,8 @@ Style Subtitle
     Size Larger
     Family Roman
   EndFont
+  DocBookTag            subtitle
+  DocBookInInfo         maybe
 End
 
 Style Email
diff --git a/lib/layouts/beamer.layout b/lib/layouts/beamer.layout
index e17380bd26..6ba8b2e180 100644
--- a/lib/layouts/beamer.layout
+++ b/lib/layouts/beamer.layout
@@ -1045,6 +1045,8 @@ Style Subtitle
     Series         Bold
     Color          Blue
   EndFont
+  DocBookTag       subtitle
+  DocBookInInfo    maybe
 End
 
 Style Author
diff --git a/lib/layouts/llncs.layout b/lib/layouts/llncs.layout
index bd4a0121d5..6923cfa326 100644
--- a/lib/layouts/llncs.layout
+++ b/lib/layouts/llncs.layout
@@ -150,6 +150,8 @@ Style Subtitle
 	  Series              Bold
 	  Size                Large
 	EndFont
+	DocBookTag            subtitle
+	DocBookInInfo         maybe
 End
 
 
diff --git a/lib/layouts/paper.layout b/lib/layouts/paper.layout
index bb07251453..9a83dcdfd6 100644
--- a/lib/layouts/paper.layout
+++ b/lib/layouts/paper.layout
@@ -162,6 +162,7 @@ Style SubTitle
 	EndFont
 	HTMLTitle             false
 	DocBookTag            subtitle
+	DocBookInInfo         maybe
 End
 
 
diff --git a/lib/layouts/sigplanconf.layout b/lib/layouts/sigplanconf.layout
index 20b1cac1f0..2c7d0cb77c 100644
--- a/lib/layouts/sigplanconf.layout
+++ b/lib/layouts/sigplanconf.layout
@@ -141,6 +141,8 @@ Style Subtitle
 	Font
 	  Size		Larger
 	EndFont
+	DocBookTag            subtitle
+	DocBookInInfo         maybe
 End