diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index d241276..a7bb8bf 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -2955,11 +2955,21 @@
 func Test_nroff_file()
   filetype on
 
-  call writefile(['.TH vim 1 "YYYY Mth DD"'], 'Xfile.1', 'D')
+  call writefile(['.TH VIM 1 "YYYY Mth DD"'], 'Xfile.1', 'D')
   split Xfile.1
   call assert_equal('nroff', &filetype)
   bwipe!
 
+  call writefile(['.Dd $Mdocdate$', '.Dt "DETECTION TEST" "7"', '.Os'], 'Xfile.7', 'D')
+  split Xfile.7
+  call assert_equal('nroff', &filetype)
+  bwipe!
+
+  call writefile(['''\" t'], 'Xfile.3p', 'D')
+  split Xfile.3p
+  call assert_equal('nroff', &filetype)
+  bwipe!
+
   call writefile(['. /etc/profile'], 'Xfile.1', 'D')
   split Xfile.1
   call assert_notequal('nroff', &filetype)
diff --git a/src/version.c b/src/version.c
index 3b90185..36e94bc 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1327,
+/**/
     1326,
 /**/
     1325,