diff --git a/tgstation.dme b/tgstation.dme
index 337b3763271..3f16ba6e202 100644
--- a/tgstation.dme
+++ b/tgstation.dme
@@ -164,6 +164,7 @@
 #include "code\datums\spells\ethereal_jaunt.dm"
 #include "code\datums\spells\explosion.dm"
 #include "code\datums\spells\genetic.dm"
+#include "code\datums\spells\horsemask.dm"
 #include "code\datums\spells\inflict_handler.dm"
 #include "code\datums\spells\knock.dm"
 #include "code\datums\spells\mind_transfer.dm"