diff --git a/include/d/actor/d_a_bk.h b/include/d/actor/d_a_bk.h
index ea5cd0fa9..3c2cda21c 100644
--- a/include/d/actor/d_a_bk.h
+++ b/include/d/actor/d_a_bk.h
@@ -125,7 +125,7 @@ public:
     /* 0x1226 */ u8 m1226[0x1228 - 0x1226];
     /* 0x1228 */ s16 m1228;
     /* 0x122A */ s16 m122A;
-    /* 0x122C */ u8 m122C[0x1230 - 0x122A];
+    /* 0x122C */ u8 m122C[0x1230 - 0x122C];
     /* 0x1230 */ J3DMaterialTable* m1230;
     /* 0x1234 */ s8 m1234;
     /* 0x1235 */ u8 m1235[0x1264 - 0x1235];