diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index 17fe86d..8a29621 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -646,8 +646,8 @@
 " DTD (Document Type Definition for XML)
 au BufNewFile,BufRead *.dtd			setf dtd
 
-" DTS/DSTI (device tree files)
-au BufNewFile,BufRead *.dts,*.dtsi		setf dts
+" DTS/DSTI/DTSO (device tree files)
+au BufNewFile,BufRead *.dts,*.dtsi,*.dtso	setf dts
 
 " EDIF (*.edf,*.edif,*.edn,*.edo) or edn
 au BufNewFile,BufRead *.ed\(f\|if\|o\)		setf edif
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 544557a..b38b28f 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -214,7 +214,7 @@
     dracula: ['file.drac', 'file.drc', 'filelvs', 'filelpe', 'drac.file', 'lpe', 'lvs', 'some-lpe', 'some-lvs'],
     dtd: ['file.dtd'],
     dtrace: ['/usr/lib/dtrace/io.d'],
-    dts: ['file.dts', 'file.dtsi'],
+    dts: ['file.dts', 'file.dtsi', 'file.dtso'],
     dune: ['jbuild', 'dune', 'dune-project', 'dune-workspace'],
     dylan: ['file.dylan'],
     dylanintr: ['file.intr'],
diff --git a/src/version.c b/src/version.c
index 96f1a55..cacfec5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    108,
+/**/
     107,
 /**/
     106,