diff --git a/src/p_enemy.cpp b/src/p_enemy.cpp
index aa8eb93d1..bc1341d1f 100644
--- a/src/p_enemy.cpp
+++ b/src/p_enemy.cpp
@@ -3087,8 +3087,20 @@ void A_BossDeath(AActor *self)
 			}
 			checked = true;
 
-			P_ExecuteSpecial(sa->Action, NULL, self, false, 
-				sa->Args[0], sa->Args[1], sa->Args[2], sa->Args[3], sa->Args[4]);
+			if (sa->Action & 0x40000000)
+			{
+				// This is a Doom format special from UMAPINFO. It must be translated here, because at parsing time there is not sufficient context to do it.
+				maplinedef_t ml;
+				ml.special = sa->Action & 0x3fffffff;
+				ml.tag = sa->Args[0];
+				line_t line;
+				self->Level->TranslateLineDef(&line, &ml);
+				P_ExecuteSpecial(line.special, NULL, self, false, line.args[0], line.args[1], line.args[2], line.args[3], line.args[4]);
+			}
+			else
+			{
+				P_ExecuteSpecial(sa->Action, NULL, self, false, sa->Args[0], sa->Args[1], sa->Args[2], sa->Args[3], sa->Args[4]);
+			}
 		}
 	}
 
diff --git a/src/umapinfo.cpp b/src/umapinfo.cpp
index eccace0d6..c981fc44f 100644
--- a/src/umapinfo.cpp
+++ b/src/umapinfo.cpp
@@ -274,14 +274,10 @@ static int ParseStandardProperty(FScanner &scanner, UMapEntry *mape)
 #pragma message("Fixme: This needs to be evaluated at run time")
 			if (tag != 0 || special == 11 || special == 51 || special == 52 || special == 124)
 			{
+				// This cannot be evaluated here because this needs to be done in the context of the level being used.
 				FSpecialAction & bossact = mape->BossActions[mape->BossActions.Reserve(1)];
-				line_t line;
-				maplinedef_t mld;
-				mld.special = special;
-				mld.tag = tag;
-				//level.TranslateLineDef(&line, &mld);
-				bossact = { type, (uint8_t)line.special, {line.args[0], line.args[1],line.args[2],line.args[3],line.args[4]} };
-			}
+				bossact = { type, special | 0x40000000, tag };
+			};
 		}
 	}
 	else