diff --git a/src/fatal_system.c b/src/fatal_system.c
index 920712d2e..2079a387c 100644
--- a/src/fatal_system.c
+++ b/src/fatal_system.c
@@ -12,16 +12,19 @@ u32 sub_8011BA4(void)
     return 0;
 }
 
+// Unused
 u32 sub_8011BA8(void)
 {
     return 0;
 }
 
+// Unused
 const char *sub_8011BAC(void)
 {
     return &gNotMountText;
 }
 
+// Unused
 void sub_8011BB4(void)
 {
     Hang();