diff --git a/source/games/duke/src/funct.h b/source/games/duke/src/funct.h
index 6853e364c..2a290f46b 100644
--- a/source/games/duke/src/funct.h
+++ b/source/games/duke/src/funct.h
@@ -119,7 +119,7 @@ void checkweapons(DDukePlayer* const p);
 int findotherplayer(int p, double* d);
 void quickkill(DDukePlayer* p);
 int setpal(DDukePlayer* p);
-int haslock(sectortype* sect, int snum);
+int haslock(sectortype* sect, DDukePlayer* const p);
 void purplelavacheck(DDukePlayer* p);
 void addphealth(DDukePlayer* p, int amount, bool bigitem);
 int playereat(DDukePlayer* p, int amount, bool bigitem);
diff --git a/source/games/duke/src/player.cpp b/source/games/duke/src/player.cpp
index 2f318ee6a..5d017ba7a 100644
--- a/source/games/duke/src/player.cpp
+++ b/source/games/duke/src/player.cpp
@@ -999,9 +999,8 @@ bool movementBlocked(DDukePlayer *p)
 //
 //---------------------------------------------------------------------------
 
-int haslock(sectortype* sectp, int snum)
+int haslock(sectortype* sectp, DDukePlayer* const p)
 {
-	auto p = getPlayer(snum);
 	if (!sectp)
 		return 0;
 	if (!sectp->lockinfo)
diff --git a/source/games/duke/src/sectors_r.cpp b/source/games/duke/src/sectors_r.cpp
index 50e98169c..a0bd9ffda 100644
--- a/source/games/duke/src/sectors_r.cpp
+++ b/source/games/duke/src/sectors_r.cpp
@@ -368,7 +368,7 @@ void checksectors_r(int snum)
 				if (isactivator(act) || ismasterswitch(act))
 					return;
 			}
-			if (haslock(near.hitSector, snum))
+			if (haslock(near.hitSector, p))
 				operatesectors(near.hitSector, p->GetActor());
 			else
 			{
@@ -389,7 +389,7 @@ void checksectors_r(int snum)
 					if (isactivator(act) || ismasterswitch(act))
 						return;
 				}
-				if (haslock(near.hitSector, snum))
+				if (haslock(near.hitSector, p))
 					operatesectors(p->GetActor()->sector(), p->GetActor());
 				else
 				{