diff --git a/prism/src/parser/ast/ExpressionTemporal.java b/prism/src/parser/ast/ExpressionTemporal.java
index a4459346..81a61116 100644
--- a/prism/src/parser/ast/ExpressionTemporal.java
+++ b/prism/src/parser/ast/ExpressionTemporal.java
@@ -298,28 +298,28 @@ public class ExpressionTemporal extends Expression
 			// F a == true U a
 			op1 = Expression.True();
 			exprTemp = new ExpressionTemporal(P_U, op1, operand2);
-			exprTemp.setBoundsFrom(this);
+			exprTemp.copyBoundsFrom(this);
 			return exprTemp;
 		case P_G:
 			// G a == !(true U !a)
 			op1 = Expression.True();
 			op2 = Expression.Not(operand2);
 			exprTemp = new ExpressionTemporal(P_U, op1, op2);
-			exprTemp.setBoundsFrom(this);
+			exprTemp.copyBoundsFrom(this);
 			return Expression.Not(exprTemp);
 		case P_W:
 			// a W b == !(a&!b U !a&!b)
 			op1 = Expression.And(operand1, Expression.Not(operand2));
 			op2 = Expression.And(Expression.Not(operand1), Expression.Not(operand2));
 			exprTemp = new ExpressionTemporal(P_U, op1, op2);
-			exprTemp.setBoundsFrom(this);
+			exprTemp.copyBoundsFrom(this);
 			return Expression.Not(exprTemp);
 		case P_R:
 			// a R b == !(!a U !b)
 			op1 = Expression.Not(operand1);
 			op2 = Expression.Not(operand2);
 			exprTemp = new ExpressionTemporal(P_U, op1, op2);
-			exprTemp.setBoundsFrom(this);
+			exprTemp.copyBoundsFrom(this);
 			return Expression.Not(exprTemp);
 		}
 		throw new PrismLangException("Cannot convert " + getOperatorSymbol() + " to until form");