diff --git a/logisim/logisim-cdm-emulator/src/main/java/org/cdm/logisim/emulator/ProcessorClockState.java b/logisim/logisim-cdm-emulator/src/main/java/org/cdm/logisim/emulator/ProcessorClockState.java
index 9eddf26..37face7 100644
--- a/logisim/logisim-cdm-emulator/src/main/java/org/cdm/logisim/emulator/ProcessorClockState.java
+++ b/logisim/logisim-cdm-emulator/src/main/java/org/cdm/logisim/emulator/ProcessorClockState.java
@@ -3,8 +3,8 @@
 import com.cburch.logisim.data.Value;
 
 public class ProcessorClockState {
-    private Value lastClock = Value.FALSE;
-    private Value currentClock = Value.FALSE;
+    private Value lastClock = Value.UNKNOWN;
+    private Value currentClock = Value.UNKNOWN;
 
     public void update(Value newClock) {
         lastClock = currentClock;