diff --git a/Source/missiles.cpp b/Source/missiles.cpp
index b9ec1396e..411f9d1d1 100644
--- a/Source/missiles.cpp
+++ b/Source/missiles.cpp
@@ -954,9 +954,9 @@ Direction16 GetDirection16(Point p1, Point p2)
 	return ret;
 }
 
-void DeleteMissile(int mi, int i)
+void DeleteMissile(int i)
 {
-	AvailableMissiles[MAXMISSILES - ActiveMissileCount] = mi;
+	AvailableMissiles[MAXMISSILES - ActiveMissileCount] = ActiveMissiles[i];
 	ActiveMissileCount--;
 	if (ActiveMissileCount > 0 && i != ActiveMissileCount)
 		ActiveMissiles[i] = ActiveMissiles[ActiveMissileCount];
@@ -4277,7 +4277,7 @@ static void DeleteMissiles()
 {
 	for (int i = 0; i < ActiveMissileCount;) {
 		if (Missiles[ActiveMissiles[i]]._miDelFlag) {
-			DeleteMissile(ActiveMissiles[i], i);
+			DeleteMissile(i);
 		} else {
 			i++;
 		}
diff --git a/Source/missiles.h b/Source/missiles.h
index 61c18cadb..16845c77f 100644
--- a/Source/missiles.h
+++ b/Source/missiles.h
@@ -135,7 +135,7 @@ extern bool MissilePreFlag;
 void GetDamageAmt(int i, int *mind, int *maxd);
 int GetSpellLevel(int playerId, spell_id sn);
 Direction16 GetDirection16(Point p1, Point p2);
-void DeleteMissile(int mi, int i);
+void DeleteMissile(int i);
 bool MonsterTrapHit(int m, int mindam, int maxdam, int dist, missile_id t, bool shift);
 bool PlayerMHit(int pnum, Monster *monster, int dist, int mind, int maxd, missile_id mtype, bool shift, int earflag, bool *blocked);
 void SetMissDir(Missile &missile, int dir);
diff --git a/Source/portal.cpp b/Source/portal.cpp
index 22212905b..27007af7c 100644
--- a/Source/portal.cpp
+++ b/Source/portal.cpp
@@ -120,7 +120,7 @@ void RemovePortalMissile(int id)
 			if (Portals[id].level != 0)
 				AddUnLight(missile._mlid);
 
-			DeleteMissile(mi, i);
+			DeleteMissile(i);
 		}
 	}
 }