diff --git a/charmap.asm b/charmap.asm
index d5bd2bcf1..95e1a804a 100644
--- a/charmap.asm
+++ b/charmap.asm
@@ -416,3 +416,8 @@
 	charmap "７", $fd
 	charmap "８", $fe
 	charmap "９", $ff
+
+; ASCII charmap, for mobile functions
+	pushc
+	newcharmap ascii
+	popc
diff --git a/mobile/mobile_40.asm b/mobile/mobile_40.asm
index 1d2856682..e2921a906 100644
--- a/mobile/mobile_40.asm
+++ b/mobile/mobile_40.asm
@@ -1686,11 +1686,13 @@ Function100ae7:
 
 SECTION "tetsuji", ROMX
 
-	charmap " ", $20 ; revert to ascii
+	pushc
+	setcharmap ascii ; revert to ascii
 
 Unknown_100b0a:
 	db "tetsuji", 0
 
+	popc
 
 SECTION "bank40_2", ROMX
 
@@ -3620,7 +3622,8 @@ Function101826:
 
 SECTION "ascii 10186f", ROMX
 
-	charmap " ", $20 ; revert to ascii
+	pushc
+	setcharmap ascii ; revert to ascii
 
 Unknown_10186f:
 	db .end - @
@@ -3637,6 +3640,7 @@ Unknown_101895:
 	db $19, $67, $10, $01, "limit_crystal"
 .end	db 0
 
+popc
 
 SECTION "bank40_3", ROMX
 
diff --git a/mobile/mobile_45.asm b/mobile/mobile_45.asm
index 7de382673..45662e4e6 100644
--- a/mobile/mobile_45.asm
+++ b/mobile/mobile_45.asm
@@ -1,6 +1,7 @@
 SECTION "Mobile 45", ROMX
 
-	charmap " ", $20 ; revert to ascii
+	pushc
+	setcharmap ascii ; revert to ascii
 
 String_114000:
 	db "---", 0
@@ -59,6 +60,8 @@ String_114160:
 String_114163:
 	db ".", 0
 
+popc
+
 Jumptable_114165:
 	dw Stubbed_Function114268
 	dw Function114269
diff --git a/mobile/mobile_46.asm b/mobile/mobile_46.asm
index 9354e4704..e77ac983e 100644
--- a/mobile/mobile_46.asm
+++ b/mobile/mobile_46.asm
@@ -1484,7 +1484,8 @@ Function118b9a:
 	and a
 	ret
 
-	charmap " ", $20 ; revert to ascii
+	pushc
+	setcharmap ascii ; revert to ascii
 
 ExchangeDownloadURL:
 	db "http://gameboy.datacenter.ne.jp/cgb/download?name=/01/CGB-BXTJ/exchange/index.txt", 0
@@ -1501,6 +1502,8 @@ MenuDownloadURL:
 IndexDownloadURL:
 	db "http://gameboy.datacenter.ne.jp/cgb/download?name=/01/CGB-BXTJ/tamago/index.txt", 0
 
+	popc
+
 Unreferenced_Function118d35:
 	ld hl, $d200
 	ld a, [wcd38]
@@ -2918,6 +2921,9 @@ Function119694:
 	jr nz, .asm_119699
 	ret
 
+pushc
+setcharmap ascii
+
 Unknown_1196b8:
 	db "Mon"
 	db "Tue"
@@ -2927,6 +2933,7 @@ Unknown_1196b8:
 	db "Sat"
 	db "Sun"
 
+popc
 
 SECTION "Mobile 46 ASCII", ROMX
 ; A hack to use ascii above.