diff --git a/data/pokemon/base_stats.asm b/data/pokemon/base_stats.asm
index 27f9174e5..4d429e860 100644
--- a/data/pokemon/base_stats.asm
+++ b/data/pokemon/base_stats.asm
@@ -1,16 +1,16 @@
 tmhm: MACRO
 ; used in data/pokemon/base_stats/*.asm
-tms1 = 0 ; TM01-TM24 (24)
-tms2 = 0 ; TM25-TM48 (24)
-tms3 = 0 ; TM49-TM50 + HM01-HM07 + MT01-MT03 (12/24)
+_tms1 = 0 ; TM01-TM24 (24)
+_tms2 = 0 ; TM25-TM48 (24)
+_tms3 = 0 ; TM49-TM50 + HM01-HM07 + MT01-MT03 (12/24)
 rept _NARG
 	if DEF(\1_TMNUM)
 	if \1_TMNUM < 24 + 1
-tms1 = tms1 | (1 << ((\1_TMNUM) - 1))
+_tms1 = _tms1 | (1 << ((\1_TMNUM) - 1))
 	elif \1_TMNUM < 48 + 1
-tms2 = tms2 | (1 << ((\1_TMNUM) - 1 - 24))
+_tms2 = _tms2 | (1 << ((\1_TMNUM) - 1 - 24))
 	else
-tms3 = tms3 | (1 << ((\1_TMNUM) - 1 - 48))
+_tms3 = _tms3 | (1 << ((\1_TMNUM) - 1 - 48))
 	endc
 	else
 		fail "\1 is not a TM, HM, or move tutor move"
@@ -18,16 +18,16 @@ tms3 = tms3 | (1 << ((\1_TMNUM) - 1 - 48))
 	shift
 endr
 rept 3 ; TM01-TM24 (24/24)
-	db tms1 & $ff
-tms1 = tms1 >> 8
+	db _tms1 & $ff
+_tms1 = _tms1 >> 8
 endr
 rept 3 ; TM25-TM48 (24/24)
-	db tms2 & $ff
-tms2 = tms2 >> 8
+	db _tms2 & $ff
+_tms2 = _tms2 >> 8
 endr
 rept 2 ; TM49-TM50 + HM01-HM07 + MT01-MT03 (12/16)
-	db tms3 & $ff
-tms3 = tms3 >> 8
+	db _tms3 & $ff
+_tms3 = _tms3 >> 8
 endr
 ENDM