diff --git a/prism/src/parser/ast/ExpressionProb.java b/prism/src/parser/ast/ExpressionProb.java
index 11447dcd..104658f3 100644
--- a/prism/src/parser/ast/ExpressionProb.java
+++ b/prism/src/parser/ast/ExpressionProb.java
@@ -155,7 +155,7 @@ public class ExpressionProb extends ExpressionQuant
 	{
 		String s = "";
 
-		s += "P" + getModeString() + getRelOp();
+		s += "P" + getModifierString() + getRelOp();
 		s += (getBound() == null) ? "?" : getBound().toString();
 		s += " [ " + getExpression();
 		if (getFilter() != null)
diff --git a/prism/src/parser/ast/ExpressionQuant.java b/prism/src/parser/ast/ExpressionQuant.java
index dd144b57..8c231a2f 100644
--- a/prism/src/parser/ast/ExpressionQuant.java
+++ b/prism/src/parser/ast/ExpressionQuant.java
@@ -36,8 +36,8 @@ import prism.PrismException;
  */
 public abstract class ExpressionQuant extends Expression
 {
-	/** Optional "mode" to specify variants of the P/R/S operator */
-	protected String mode = null;
+	/** Optional "modifier" to specify variants of the P/R/S operator */
+	protected String modifier = null;
 	/** The attached relational operator (e.g. "<" in "P<0.1"). */
 	protected RelOp relOp = null;
 	/** The attached (probability/reward) bound, as an expression (e.g. "p" in "P<p"). Null if absent (e.g. "P=?"). */
@@ -51,11 +51,11 @@ public abstract class ExpressionQuant extends Expression
 	// Set methods
 
 	/**
-	 * Set the (optional) "mode" for this operator.
+	 * Set the (optional) "modifier" for this operator.
 	 */
-	public void setMode(String mode)
+	public void setMode(String modifier)
 	{
-		this.mode = mode;
+		this.modifier = modifier;
 	}
 
 	/**
@@ -104,19 +104,19 @@ public abstract class ExpressionQuant extends Expression
 	// Get methods
 
 	/**
-	 * Get the (optional) "mode" for this operator.
+	 * Get the (optional) "modifier" for this operator.
 	 */
-	public String getMode()
+	public String getModifier()
 	{
-		return mode;
+		return modifier;
 	}
 
 	/**
-	 * Get a string representing the model as a suffix for the operator.
+	 * Get a string representing the modifier as a suffix for the operator.
 	 */
-	public String getModeString()
+	public String getModifierString()
 	{
-		return mode == null ? "" : "(" + mode + ")";
+		return modifier == null ? "" : "(" + modifier + ")";
 	}
 
 	/**
diff --git a/prism/src/parser/ast/ExpressionReward.java b/prism/src/parser/ast/ExpressionReward.java
index d9726cec..49bb56a1 100644
--- a/prism/src/parser/ast/ExpressionReward.java
+++ b/prism/src/parser/ast/ExpressionReward.java
@@ -241,7 +241,7 @@ public class ExpressionReward extends ExpressionQuant
 	{
 		String s = "";
 		
-		s += "R" + getModeString();
+		s += "R" + getModifierString();
 		if (rewardStructIndex != null) {
 			if (rewardStructIndex instanceof Expression) s += "{"+rewardStructIndex+"}";
 			else if (rewardStructIndex instanceof String) s += "{\""+rewardStructIndex+"\"}";
diff --git a/prism/src/parser/ast/ExpressionSS.java b/prism/src/parser/ast/ExpressionSS.java
index 5c7793d3..b6b05ea5 100644
--- a/prism/src/parser/ast/ExpressionSS.java
+++ b/prism/src/parser/ast/ExpressionSS.java
@@ -141,7 +141,7 @@ public class ExpressionSS extends ExpressionQuant
 	{
 		String s = "";
 		
-		s += "S" + getModeString() + getRelOp();
+		s += "S" + getModifierString() + getRelOp();
 		s += (getBound()==null) ? "?" : getBound().toString();
 		s += " [ " + getExpression();
 		if (getFilter() != null) s += " "+getFilter();