diff --git a/src/namedef.h b/src/namedef.h
index 5478349e6..fc0ebad24 100644
--- a/src/namedef.h
+++ b/src/namedef.h
@@ -332,6 +332,7 @@ xx(Radius)
 xx(ReactionTime)
 xx(MeleeRange)
 xx(Speed)
+xx(Clamp)
 
 // Various actor names which are used internally
 xx(MapSpot)
diff --git a/src/thingdef/thingdef_exp.cpp b/src/thingdef/thingdef_exp.cpp
index 7ef93563c..8cfd737b9 100644
--- a/src/thingdef/thingdef_exp.cpp
+++ b/src/thingdef/thingdef_exp.cpp
@@ -57,6 +57,7 @@ static FxExpression *ParseRandomPick(FScanner &sc, FName identifier, PClassActor
 static FxExpression *ParseRandom2(FScanner &sc, PClassActor *cls);
 static FxExpression *ParseAbs(FScanner &sc, PClassActor *cls);
 static FxExpression *ParseMinMax(FScanner &sc, FName identifier, PClassActor *cls);
+static FxExpression *ParseClamp(FScanner &sc, PClassActor *cls);
 
 //
 // ParseExpression
@@ -381,6 +382,8 @@ static FxExpression *ParseExpression0 (FScanner &sc, PClassActor *cls)
 			case NAME_Min:
 			case NAME_Max:
 				return ParseMinMax(sc, identifier, cls);
+			case NAME_Clamp:
+				return ParseClamp(sc, cls);
 			case NAME_Abs:
 				return ParseAbs(sc, cls);
 			default:
@@ -521,3 +524,23 @@ static FxExpression *ParseMinMax(FScanner &sc, FName identifier, PClassActor *cl
 	}
 	return new FxMinMax(list, identifier, sc);
 }
+
+static FxExpression *ParseClamp(FScanner &sc, PClassActor *cls)
+{
+	FxExpression *src = ParseExpressionM(sc, cls);
+	sc.MustGetToken(',');
+	FxExpression *min = ParseExpressionM(sc, cls);
+	sc.MustGetToken(',');
+	FxExpression *max = ParseExpressionM(sc, cls);
+	sc.MustGetToken(')');
+
+	// Build clamp(a,x,y) as min(max(a,x),y)
+	TArray<FxExpression *> list(2);
+	list.Reserve(2);
+	list[0] = src;
+	list[1] = min;
+	FxExpression *maxexpr = new FxMinMax(list, NAME_Max, sc);
+	list[0] = maxexpr;
+	list[1] = max;
+	return new FxMinMax(list, NAME_Min, sc);
+}