diff --git a/files/fielddata/script/scr_seq/scr_seq_0250_R39R0101.s b/files/fielddata/script/scr_seq/scr_seq_0250_R39R0101.s
index 868572969..671406301 100644
--- a/files/fielddata/script/scr_seq/scr_seq_0250_R39R0101.s
+++ b/files/fielddata/script/scr_seq/scr_seq_0250_R39R0101.s
@@ -108,12 +108,12 @@ scr_seq_R39R0101_001:
 	end
 
 _0158:
-	goto_if_set FLAG_UNK_0AB, _0197
+	goto_if_set FLAG_GOT_TM83_FROM_MOOMOO_FARM_WOMAN, _0197
 	npc_msg msg_0397_R39R0101_00008
 	wait_button
 	goto_if_no_item_space ITEM_TM83, 1, _01A2
 	callstd std_give_item_verbose
-	setflag FLAG_UNK_0AB
+	setflag FLAG_GOT_TM83_FROM_MOOMOO_FARM_WOMAN
 	goto _0197
 
 _0197:
diff --git a/include/constants/flags.h b/include/constants/flags.h
index 6c6fe0bf9..b8956793d 100644
--- a/include/constants/flags.h
+++ b/include/constants/flags.h
@@ -188,7 +188,7 @@
 #define FLAG_UNK_0A8                                                0xA8
 #define FLAG_UNK_0A9                                                0xA9
 #define FLAG_UNK_0AA                                                0xAA
-#define FLAG_UNK_0AB                                                0xAB
+#define FLAG_GOT_TM83_FROM_MOOMOO_FARM_WOMAN                        0xAB
 #define FLAG_UNK_0AC                                                0xAC
 #define FLAG_UNK_0AD                                                0xAD
 #define FLAG_UNK_0AE                                                0xAE