diff --git a/src/g_shared/a_artifacts.cpp b/src/g_shared/a_artifacts.cpp
index 14b2704355..8ac35f8405 100644
--- a/src/g_shared/a_artifacts.cpp
+++ b/src/g_shared/a_artifacts.cpp
@@ -1922,7 +1922,7 @@ void APowerMorph::EndEffect( )
 	if (!bNoCallUndoMorph)
 	{
 		int savedMorphTics = Player->morphTics;
-		P_UndoPlayerMorph (Player, Player);
+		P_UndoPlayerMorph (Player, Player, 0, !!(Player->MorphStyle & MORPH_UNDOALWAYS));
 
 		// Abort if unmorph failed; in that case,
 		// set the usual retry timer and return.
diff --git a/src/g_shared/a_morph.h b/src/g_shared/a_morph.h
index e86332b3dd..9272901dd2 100644
--- a/src/g_shared/a_morph.h
+++ b/src/g_shared/a_morph.h
@@ -24,6 +24,7 @@ enum
 	MORPH_UNDOBYDEATHFORCED	= 0x00000400,	// Actor (if unmorphed when killed) forces unmorph (not very useful with UNDOBYDEATHSAVES)
 	MORPH_UNDOBYDEATHSAVES	= 0x00000800,	// Actor (if unmorphed when killed) regains their health and doesn't die
 	MORPH_UNDOBYTIMEOUT		= 0x00001000,	// Player unmorphs once countdown expires
+	MORPH_UNDOALWAYS		= 0x00002000,	// Powerups must always unmorph, no matter what.
 
 	MORPH_STANDARDUNDOING	= MORPH_UNDOBYTOMEOFPOWER | MORPH_UNDOBYCHAOSDEVICE | MORPH_UNDOBYTIMEOUT,
 };
diff --git a/src/thingdef/thingdef_parse.cpp b/src/thingdef/thingdef_parse.cpp
index 88e6084b64..61922feaf9 100644
--- a/src/thingdef/thingdef_parse.cpp
+++ b/src/thingdef/thingdef_parse.cpp
@@ -526,6 +526,7 @@ static int ParseMorphStyle (FScanner &sc)
 		{ "MRF_UNDOBYDEATH",		MORPH_UNDOBYDEATH}, 
 		{ "MRF_UNDOBYDEATHFORCED",	MORPH_UNDOBYDEATHFORCED},  
 		{ "MRF_UNDOBYDEATHSAVES",	MORPH_UNDOBYDEATHSAVES},
+		{ "MRF_UNDOALWAYS",			MORPH_UNDOALWAYS },
 		{ NULL, 0 }
 	};
 
diff --git a/wadsrc/static/actors/constants.txt b/wadsrc/static/actors/constants.txt
index e6434a08ea..2ded98bc77 100644
--- a/wadsrc/static/actors/constants.txt
+++ b/wadsrc/static/actors/constants.txt
@@ -140,6 +140,7 @@ const int MRF_NEWTIDBEHAVIOUR = 256;
 const int MRF_UNDOBYDEATH = 512;
 const int MRF_UNDOBYDEATHFORCED = 1024;
 const int MRF_UNDOBYDEATHSAVES = 2048;
+const int MRF_UNDOALWAYS = 4096;
 
 // Flags for A_RailAttack and A_CustomRailgun
 const int RGF_SILENT = 1;