diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index a1cff46..90ba961 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -1811,6 +1811,9 @@
 " S-lang (or shader language, or SmallLisp)
 au BufNewFile,BufRead *.sl			setf slang
 
+" Sage
+au BufNewFile,BufRead *.sage			setf sage
+
 " Samba config
 au BufNewFile,BufRead smb.conf			setf samba
 
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 55548e4..e5f16cd 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -540,6 +540,7 @@
     \ 'skill': ['file.il', 'file.ils', 'file.cdf'],
     \ 'cdc': ['file.cdc'],
     \ 'slang': ['file.sl'],
+    \ 'sage': ['file.sage'],
     \ 'slice': ['file.ice'],
     \ 'slpconf': ['/etc/slp.conf', 'any/etc/slp.conf'],
     \ 'slpreg': ['/etc/slp.reg', 'any/etc/slp.reg'],
diff --git a/src/version.c b/src/version.c
index f6cac46..8ed8263 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1422,
+/**/
     1421,
 /**/
     1420,