diff --git a/tools/sort_symfile.sh b/tools/sort_symfile.sh
index 4fa48deb0..a712b97c8 100755
--- a/tools/sort_symfile.sh
+++ b/tools/sort_symfile.sh
@@ -4,10 +4,10 @@ sed \
     -e "s/^..:[0-3]/0_ROM0@&/g" \
     -e "s/^..:[4-7]/1_ROMX@&/g" \
     -e "s/^..:[8-9]/2_VRAM@&/g" \
-    -e "s/^..:[A-B]/3_SRAM@&/g" \
-    -e "s/^00:[C-D]/4_WRAM0@&/g" \
-    -e "s/^..:[D-D]/5_WRAMX@&/g" \
-    -e "s/^..:[F-F]/6_HRAM@&/g" \
+    -e "s/^..:[A-Ba-b]/3_SRAM@&/g" \
+    -e "s/^00:[C-Dc-d]/4_WRAM0@&/g" \
+    -e "s/^..:[D-Dd-d]/5_WRAMX@&/g" \
+    -e "s/^..:[F-Ff-f]/6_HRAM@&/g" \
     $1 \
 | sort \
 | sed -e "s/^.*@//g" > $TEMP_FILE