diff --git a/plugins/proto/RemoteFortressReader.proto b/plugins/proto/RemoteFortressReader.proto
index c0d7104a7..1344bb694 100644
--- a/plugins/proto/RemoteFortressReader.proto
+++ b/plugins/proto/RemoteFortressReader.proto
@@ -182,7 +182,7 @@ message UnitDefinition
     optional uint32 flags1 = 8;
     optional uint32 flags2 = 9;
     optional uint32 flags3 = 10;
-	optional bool is_soldier = 11;
+    optional bool is_soldier = 11;
 }
 
 message UnitList