diff --git a/include/efxbattle.h b/include/efxbattle.h
index de5c38d7..6345b90a 100644
--- a/include/efxbattle.h
+++ b/include/efxbattle.h
@@ -526,7 +526,7 @@ extern u32 gUnknown_02017750;
 extern u32 gUnknown_02017754;
 extern u32 gUnknown_02017758;
 extern u32 gUnknown_0201775C;
-struct Vec2 gEkrBg2QuakeVec;
+extern struct Vec2 gEkrBg2QuakeVec;
 extern s16 gUnknown_02017764[2];
 extern s16 gUnknown_02017768[2];