diff --git a/headers/functions/overlay29.h b/headers/functions/overlay29.h
index 1ac75d7e..84039493 100644
--- a/headers/functions/overlay29.h
+++ b/headers/functions/overlay29.h
@@ -34,7 +34,7 @@ bool ShouldDisplayEntityWrapper(struct entity* entity);
 bool CanSeeTarget(struct entity* user, struct entity* target);
 bool CanTargetEntity(struct entity* user, struct entity* target);
 bool CanTargetPosition(struct entity* monster, struct position* position);
-void PopulateActiveMonsterPtrs();
+void PopulateActiveMonsterPtrs(void);
 int GetTeamMemberIndex(struct entity* monster);
 void SubstitutePlaceholderStringTags(int string_id, struct entity* entity, undefined4 param_3);
 bool UpdateMapSurveyorFlag(void);
diff --git a/symbols/overlay29.yml b/symbols/overlay29.yml
index c281300f..9fef00b7 100644
--- a/symbols/overlay29.yml
+++ b/symbols/overlay29.yml
@@ -495,7 +495,10 @@ overlay29:
     - name: PopulateActiveMonsterPtrs
       address:
         EU: 0x22E32B8
-      description: Populates active_monster_ptrs with all valid monsters in the monster_slot_headers array.
+      description: |-
+        Populates active_monster_ptrs with all valid monsters in the monster_slot_headers array.
+        
+        No params.
     - name: GetTeamMemberIndex
       address:
         EU: 0x22E3378