diff --git a/oni-csharp.el b/oni-csharp.el
index 927d46a..74d1fb5 100644
--- a/oni-csharp.el
+++ b/oni-csharp.el
@@ -4,7 +4,7 @@
 
 ;; Author: Tom Willemse <tom@ryuslash.org>
 ;; Keywords: local
-;; Version: 2020.0128.214417
+;; Version: 2020.0128.221359
 ;; Package-Requires: (csharp-mode omnisharp oni-company oni-flycheck)
 
 ;; This program is free software; you can redistribute it and/or modify
@@ -94,6 +94,9 @@
 ;;;###autoload
 (add-to-list 'auto-mode-alist '("\\.xaml\\'" . nxml-mode))
 
+;;;###autoload
+(add-to-list 'auto-mode-alist '("\\.csproj\\'" . nxml-mode))
+
 ;;;###autoload(with-eval-after-load 'csharp-mode (require 'oni-csharp))
 
 (provide 'oni-csharp)
diff --git a/test/integration/oni-csharp.bats b/test/integration/oni-csharp.bats
index 241a335..bdfcbd0 100644
--- a/test/integration/oni-csharp.bats
+++ b/test/integration/oni-csharp.bats
@@ -19,3 +19,13 @@
 
     [[ "$output" == *"nxml-mode" ]]
 }
+
+@test "Opening a .csproj file loads nxml-mode" {
+    run emacs -batch -l package -f package-initialize \
+        -visit test.csproj \
+        -eval "(prin1 major-mode)"
+
+    echo "$output"
+
+    [[ "$output" == *"nxml-mode" ]]
+}