diff --git a/src/overlays/actors/ovl_En_Po_Sisters/z_en_po_sisters.h b/src/overlays/actors/ovl_En_Po_Sisters/z_en_po_sisters.h
index f1ed0d98aa..afe56f9809 100644
--- a/src/overlays/actors/ovl_En_Po_Sisters/z_en_po_sisters.h
+++ b/src/overlays/actors/ovl_En_Po_Sisters/z_en_po_sisters.h
@@ -39,9 +39,9 @@ typedef enum EnPoSisterNames {
     EN_PO_SISTERS_AMY,    // green sister, hides in block puzzle
 } EnPoSisterNames;
 
-#define POE_SISTER_GET_ID(thisx) PARAMS_GET_U(thisx->params, 8, 2)
-#define POE_SISTER_GET_DECOY(thisx) PARAMS_GET_U(thisx->params, 10, 2)
-#define POE_SISTER_GET_INTRO(thisx) PARAMS_GET_U(thisx->params, 12, 1)
+#define POE_SISTER_GET_ID(x) PARAMS_GET_U(x->params, 8, 2)
+#define POE_SISTER_GET_DECOY(x) PARAMS_GET_U(x->params, 10, 2)
+#define POE_SISTER_GET_INTRO(x) PARAMS_GET_U(x->params, 12, 1)
 
 #define EN_PO_SISTERS_PARAM_N(n) (n << 8) // param for which sister by number
 #define EN_PO_SISTERS_PARAM(name) (EN_PO_SISTERS_##name << 8) // param for which sister by name