diff --git a/src/g_shared/sbarinfo_commands.cpp b/src/g_shared/sbarinfo_commands.cpp
index c9011e8512..ce94b2bc23 100644
--- a/src/g_shared/sbarinfo_commands.cpp
+++ b/src/g_shared/sbarinfo_commands.cpp
@@ -3383,43 +3383,16 @@ class CommandInInventory : public SBarInfoCommandFlowControl
 			AInventory *invItem[2] = { statusBar->CPlayer->mo->FindInventory(item[0]), statusBar->CPlayer->mo->FindInventory(item[1]) };
 			if (invItem[0] != NULL && amount[0] > 0 && invItem[0]->Amount < amount[0]) invItem[0] = NULL;
 			if (invItem[1] != NULL && amount[1] > 0 && invItem[1]->Amount < amount[1]) invItem[1] = NULL;
-			if(invItem[1] != NULL && conditionAnd)
+
+			if (item[1])
 			{
-				if((invItem[0] != NULL && invItem[1] != NULL) && !negate)
-				{
-					SetTruth(true, block, statusBar);
-					return;
-				}
-				else if((invItem[0] == NULL || invItem[1] == NULL) && negate)
-				{
-					SetTruth(true, block, statusBar);
-					return;
-				}
+				if (conditionAnd)
+					SetTruth((invItem[0] && invItem[1]) != negate, block, statusBar);
+				else
+					SetTruth((invItem[0] || invItem[1]) != negate, block, statusBar);
 			}
-			else if(invItem[1] != NULL && !conditionAnd)
-			{
-				if((invItem[0] != NULL || invItem[1] != NULL) && !negate)
-				{
-					SetTruth(true, block, statusBar);
-					return;
-				}
-				else if((invItem[0] == NULL && invItem[1] == NULL) && negate)
-				{
-					SetTruth(true, block, statusBar);
-					return;
-				}
-			}
-			else if((invItem[0] != NULL) && !negate)
-			{
-				SetTruth(true, block, statusBar);
-				return;
-			}
-			else if((invItem[0] == NULL) && negate)
-			{
-				SetTruth(true, block, statusBar);
-				return;
-			}
-			SetTruth(false, block, statusBar);
+			else
+				SetTruth((invItem[0] != NULL) != negate, block, statusBar);
 		}
 	protected:
 		bool			conditionAnd;
@@ -3458,6 +3431,46 @@ class CommandAlpha : public SBarInfoMainBlock
 
 ////////////////////////////////////////////////////////////////////////////////
 
+class CommandIfHealth : public SBarInfoCommandFlowControl
+{
+	public:
+		CommandIfHealth(SBarInfo *script) : SBarInfoCommandFlowControl(script),
+			negate(false), percentage(false)
+		{
+		}
+
+		void	Parse(FScanner &sc, bool fullScreenOffsets)
+		{
+			if (sc.CheckToken(TK_Identifier))
+			{
+				if (sc.Compare("not"))
+					negate = true;
+				else
+					sc.ScriptError("Expected 'not', but got '%s' instead.", sc.String);
+			}
+
+			sc.MustGetToken(TK_IntConst);
+			percentage = sc.CheckToken('%');
+			hpamount = sc.Number;
+
+			SBarInfoCommandFlowControl::Parse(sc, fullScreenOffsets);
+		}
+		void	Tick(const SBarInfoMainBlock *block, const DSBarInfo *statusBar, bool hudChanged)
+		{
+			SBarInfoCommandFlowControl::Tick(block, statusBar, hudChanged);
+
+			int phealth = percentage ? statusBar->CPlayer->mo->health * 100 / statusBar->CPlayer->mo->GetMaxHealth() : statusBar->CPlayer->mo->health;
+
+			SetTruth((phealth >= hpamount) ^ negate, block, statusBar);
+		}
+	protected:
+		bool	negate;
+		bool	percentage;
+		int		hpamount;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
 static const char *SBarInfoCommandNames[] =
 {
 	"drawimage", "drawnumber", "drawswitchableimage",
@@ -3467,7 +3480,7 @@ static const char *SBarInfoCommandNames[] =
 	"gamemode", "playerclass", "playertype", "aspectratio",
 	"isselected", "usesammo", "usessecondaryammo",
 	"hasweaponpiece", "inventorybarnotvisible",
-	"weaponammo", "ininventory", "alpha",
+	"weaponammo", "ininventory", "alpha", "ifhealth",
 	NULL
 };
 
@@ -3480,7 +3493,7 @@ enum SBarInfoCommands
 	SBARINFO_GAMEMODE, SBARINFO_PLAYERCLASS, SBARINFO_PLAYERTYPE, SBARINFO_ASPECTRATIO,
 	SBARINFO_ISSELECTED, SBARINFO_USESAMMO, SBARINFO_USESSECONDARYAMMO,
 	SBARINFO_HASWEAPONPIECE, SBARINFO_INVENTORYBARNOTVISIBLE,
-	SBARINFO_WEAPONAMMO, SBARINFO_ININVENTORY, SBARINFO_ALPHA,
+	SBARINFO_WEAPONAMMO, SBARINFO_ININVENTORY, SBARINFO_ALPHA, SBARINFO_IFHEALTH,
 };
 
 SBarInfoCommand *SBarInfoCommandFlowControl::NextCommand(FScanner &sc)
@@ -3513,6 +3526,7 @@ SBarInfoCommand *SBarInfoCommandFlowControl::NextCommand(FScanner &sc)
 			case SBARINFO_WEAPONAMMO: return new CommandWeaponAmmo(script);
 			case SBARINFO_ININVENTORY: return new CommandInInventory(script);
 			case SBARINFO_ALPHA: return new CommandAlpha(script);
+			case SBARINFO_IFHEALTH: return new CommandIfHealth(script);
 		}
 
 		sc.ScriptError("Unknown command '%s'.\n", sc.String);
diff --git a/src/p_setup.cpp b/src/p_setup.cpp
index a6dbca868f..6b5d9403f0 100644
--- a/src/p_setup.cpp
+++ b/src/p_setup.cpp
@@ -537,34 +537,31 @@ void MapData::GetChecksum(BYTE cksum[16])
 {
 	MD5Context md5;
 
-	if (file != NULL)
+	if (isText)
 	{
-		if (isText)
+		Seek(ML_TEXTMAP);
+		if (file != NULL) md5.Update(file, Size(ML_TEXTMAP));
+	}
+	else
+	{
+		if (Size(ML_LABEL) != 0)
 		{
-			Seek(ML_TEXTMAP);
-			md5.Update(file, Size(ML_TEXTMAP));
-		}
-		else
-		{
-			if (Size(ML_LABEL) != 0)
-			{
-				Seek(ML_LABEL);
-				md5.Update(file, Size(ML_LABEL));
-			}
-			Seek(ML_THINGS);
-			md5.Update(file, Size(ML_THINGS));
-			Seek(ML_LINEDEFS);
-			md5.Update(file, Size(ML_LINEDEFS));
-			Seek(ML_SIDEDEFS);
-			md5.Update(file, Size(ML_SIDEDEFS));
-			Seek(ML_SECTORS);
-			md5.Update(file, Size(ML_SECTORS));
-		}
-		if (HasBehavior)
-		{
-			Seek(ML_BEHAVIOR);
-			md5.Update(file, Size(ML_BEHAVIOR));
+			Seek(ML_LABEL);
+			if (file != NULL) md5.Update(file, Size(ML_LABEL));
 		}
+		Seek(ML_THINGS);
+		if (file != NULL) md5.Update(file, Size(ML_THINGS));
+		Seek(ML_LINEDEFS);
+		if (file != NULL) md5.Update(file, Size(ML_LINEDEFS));
+		Seek(ML_SIDEDEFS);
+		if (file != NULL) md5.Update(file, Size(ML_SIDEDEFS));
+		Seek(ML_SECTORS);
+		if (file != NULL) md5.Update(file, Size(ML_SECTORS));
+	}
+	if (HasBehavior)
+	{
+		Seek(ML_BEHAVIOR);
+		if (file != NULL) md5.Update(file, Size(ML_BEHAVIOR));
 	}
 	md5.Final(cksum);
 }