diff --git a/src/main/java/org/cobweb/cobweb2/plugins/pd/PDAgentParams.java b/src/main/java/org/cobweb/cobweb2/plugins/pd/PDAgentParams.java
index d4faf53..415802f 100644
--- a/src/main/java/org/cobweb/cobweb2/plugins/pd/PDAgentParams.java
+++ b/src/main/java/org/cobweb/cobweb2/plugins/pd/PDAgentParams.java
@@ -10,6 +10,10 @@
 
 public class PDAgentParams implements ParameterSerializable {
 
+	@ConfDisplayName("PD Enabled")
+	@ConfXMLTag("pdEnabled")
+	public boolean pdEnabled = true;
+
 	/**
 	 * Use tit-for-tat strategy for prisoner's dilemma.
 	 */
diff --git a/src/main/java/org/cobweb/cobweb2/plugins/pd/PDMutator.java b/src/main/java/org/cobweb/cobweb2/plugins/pd/PDMutator.java
index c516a99..760d404 100644
--- a/src/main/java/org/cobweb/cobweb2/plugins/pd/PDMutator.java
+++ b/src/main/java/org/cobweb/cobweb2/plugins/pd/PDMutator.java
@@ -26,7 +26,7 @@ public void setParams(PDParams pdParams) {
 
 	@Override
 	public PDState stateForNewAgent(Agent agent) {
-		if (!params.enable)
+		if (!params.enable || !params.agentParams[agent.getType()].pdEnabled)
 			return null;
 
 		return new PDState(params.agentParams[agent.getType()].clone());
@@ -34,7 +34,7 @@ public PDState stateForNewAgent(Agent agent) {
 
 	@Override
 	protected PDState stateFromParent(Agent agent, PDState parentState) {
-		if (!params.enable)
+		if (!params.enable || !params.agentParams[agent.getType()].pdEnabled)
 			return null;
 
 		return new PDState(parentState.agentParams.clone());