diff --git a/src/g_level.cpp b/src/g_level.cpp
index 478a014917..1fd0130dcf 100644
--- a/src/g_level.cpp
+++ b/src/g_level.cpp
@@ -1319,6 +1319,8 @@ void G_InitLevelLocals ()
 	compatflags.Callback();
 
 	NormalLight.ChangeFade (level.fadeto);
+
+	level.DefaultEnvironment = info->DefaultEnvironment;
 }
 
 //==========================================================================
diff --git a/src/g_level.h b/src/g_level.h
index 0e17b02b11..58ddf9d5ca 100644
--- a/src/g_level.h
+++ b/src/g_level.h
@@ -279,6 +279,7 @@ struct level_info_t
 	DWORD		compatflags;
 	DWORD		compatmask;
 	FString		Translator;	// for converting Doom-format linedef and sector types.
+	int			DefaultEnvironment;	// Default sound environment for the map.
 
 	// Redirection: If any player is carrying the specified item, then
 	// you go to the RedirectMap instead of this one.
@@ -391,6 +392,7 @@ struct FLevelLocals
 	fixed_t		aircontrol;
 	fixed_t		airfriction;
 	int			airsupply;
+	int			DefaultEnvironment;		// Default sound environment.
 
 	FSectorScrollValues	*Scrolls;		// NULL if no DScrollers in this level
 
diff --git a/src/g_mapinfo.cpp b/src/g_mapinfo.cpp
index 09e8eb96a3..6131c70171 100644
--- a/src/g_mapinfo.cpp
+++ b/src/g_mapinfo.cpp
@@ -265,6 +265,7 @@ void level_info_t::Reset()
 	bordertexture[0] = 0;
 	teamdamage = 0.f;
 	specialactions.Clear();
+	DefaultEnvironment = 0;
 }
 
 
@@ -1250,6 +1251,20 @@ DEFINE_MAP_OPTION(mapbackground, true)
 	parse.ParseLumpOrTextureName(info->mapbg);
 }
 
+DEFINE_MAP_OPTION(defaultenvironment, false)
+{
+	int id;
+
+	parse.ParseAssign();
+	parse.sc.MustGetNumber();
+	id = parse.sc.Number << 8;
+	if (parse.CheckNumber())
+	{
+		id |= parse.sc.Number;
+	}
+	info->DefaultEnvironment = id;
+}
+
 
 //==========================================================================
 //
diff --git a/src/p_setup.cpp b/src/p_setup.cpp
index 3f55dbe234..c27da8e56d 100644
--- a/src/p_setup.cpp
+++ b/src/p_setup.cpp
@@ -729,6 +729,7 @@ void P_FloodZone (sector_t *sec, int zonenum)
 void P_FloodZones ()
 {
 	int z = 0, i;
+	ReverbContainer *reverb;
 
 	for (i = 0; i < numsectors; ++i)
 	{
@@ -739,9 +740,15 @@ void P_FloodZones ()
 	}
 	numzones = z;
 	zones = new zone_t[z];
+	reverb = S_FindEnvironment(level.DefaultEnvironment);
+	if (reverb == NULL)
+	{
+		Printf("Sound environment %d, %d not found\n", level.DefaultEnvironment >> 8, level.DefaultEnvironment & 255);
+		reverb = DefaultEnvironments[0];
+	}
 	for (i = 0; i < z; ++i)
 	{
-		zones[i].Environment = DefaultEnvironments[0];
+		zones[i].Environment = reverb;
 	}
 }