diff --git a/src/include/types.h b/src/include/types.h
index d0242c01f..da5d058b4 100644
--- a/src/include/types.h
+++ b/src/include/types.h
@@ -5235,7 +5235,7 @@ struct mplockinfo {
 
 struct boltbeam {
 	union {
-		s32 unk00;
+		intptr_t unk00;
 		struct prop *unk00_prop;
 	};