diff --git a/.gitignore b/.gitignore
index 71dc2c1b..d0dd3106 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ MyDevWIP
 # ignore swap files
 *.swp
 *.swo
+.DS_Store
diff --git a/Systems/instrumentation.xml b/Systems/instrumentation.xml
index 4f9ac4c5..802a4b12 100644
--- a/Systems/instrumentation.xml
+++ b/Systems/instrumentation.xml
@@ -183,9 +183,9 @@
 	</marker-beacon>
 	
 	<marker-beacon>
-        <name>marker-beacon</name>
-        <number>0</number>
-    </marker-beacon>
+		<name>marker-beacon</name>
+		<number>0</number>
+	</marker-beacon>
 	
 	<nav-radio> <!-- VOR unit -->
 		<name>nav</name>