diff --git a/source/games/duke/src/animatesprites_d.cpp b/source/games/duke/src/animatesprites_d.cpp
index 8ef66c157..258140ab2 100644
--- a/source/games/duke/src/animatesprites_d.cpp
+++ b/source/games/duke/src/animatesprites_d.cpp
@@ -324,7 +324,7 @@ void animatesprites_d(tspriteArray& tsprites, const DVector2& viewVec, DAngle vi
 		case DTILE_BURNING:
 		case DTILE_BURNING2:
 			if (!OwnerAc || !actorflag(OwnerAc, SFLAG_NOFLOORFIRE))
-				t->pos.Z = t->sectp->floorz;
+				t->pos.Z = getflorzofslopeptr(t->sectp, t->pos);
 			t->shade = -127;
 			break;
 		case DTILE_PLAYERONWATER:
diff --git a/source/games/duke/src/animatesprites_r.cpp b/source/games/duke/src/animatesprites_r.cpp
index 5ad4d5c7e..c73478b6b 100644
--- a/source/games/duke/src/animatesprites_r.cpp
+++ b/source/games/duke/src/animatesprites_r.cpp
@@ -376,7 +376,7 @@ void animatesprites_r(tspriteArray& tsprites, const DVector2& viewVec, DAngle vi
 		case RTILE_FIRE:
 		case RTILE_BURNING:
 			if (!OwnerAc || !actorflag(OwnerAc, SFLAG_NOFLOORFIRE))
-				t->pos.Z = t->sectp->floorz;
+				t->pos.Z = getflorzofslopeptr(t->sectp, t->pos);
 			t->shade = -127;
 			break;
 		case RTILE_CHEER: