diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index 7618902..fe1a888 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -2746,6 +2746,9 @@
 " tmux configuration with arbitrary extension
 au BufNewFile,BufRead {.,}tmux*.conf*		setf tmux
 
+" Universal Scene Description
+au BufNewFile,BufRead *.usda,*.usd		setf usd
+
 " VHDL
 au BufNewFile,BufRead *.vhdl_[0-9]*		call s:StarSetf('vhdl')
 
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 3e90381..ceaee8a 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -638,6 +638,7 @@
     \ 'upstreamdat': ['upstream.dat', 'UPSTREAM.DAT', 'upstream.file.dat', 'UPSTREAM.FILE.DAT', 'file.upstream.dat', 'FILE.UPSTREAM.DAT'],
     \ 'upstreaminstalllog': ['upstreaminstall.log', 'UPSTREAMINSTALL.LOG', 'upstreaminstall.file.log', 'UPSTREAMINSTALL.FILE.LOG', 'file.upstreaminstall.log', 'FILE.UPSTREAMINSTALL.LOG'],
     \ 'upstreamlog': ['fdrupstream.log', 'upstream.log', 'UPSTREAM.LOG', 'upstream.file.log', 'UPSTREAM.FILE.LOG', 'file.upstream.log', 'FILE.UPSTREAM.LOG', 'UPSTREAM-file.log', 'UPSTREAM-FILE.LOG'],
+    \ 'usd': ['file.usda', 'file.usd'],
     \ 'usserverlog': ['usserver.log', 'USSERVER.LOG', 'usserver.file.log', 'USSERVER.FILE.LOG', 'file.usserver.log', 'FILE.USSERVER.LOG'],
     \ 'usw2kagtlog': ['usw2kagt.log', 'USW2KAGT.LOG', 'usw2kagt.file.log', 'USW2KAGT.FILE.LOG', 'file.usw2kagt.log', 'FILE.USW2KAGT.LOG'],
     \ 'vala': ['file.vala'],
diff --git a/src/version.c b/src/version.c
index a3c9453..857a229 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1549,
+/**/
     1548,
 /**/
     1547,