diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 96cb686..0684383 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -1534,6 +1534,12 @@
   bwipe!
   call delete('go.mod')
 
+  call writefile(['module M'], 'go.mod')
+  split go.mod
+  call assert_equal('gomod', &filetype)
+  bwipe!
+  call delete('go.mod')
+
   filetype off
 endfunc
 
diff --git a/src/version.c b/src/version.c
index fbe684a..ad1b686 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1591,
+/**/
     1590,
 /**/
     1589,