diff --git a/se/sics/mspsim/core/Flash.java b/se/sics/mspsim/core/Flash.java
index 648f902..11063bd 100644
--- a/se/sics/mspsim/core/Flash.java
+++ b/se/sics/mspsim/core/Flash.java
@@ -578,7 +578,7 @@ public class Flash extends IOUnit {
       break;
 
     case FCTL3:
-      if ((statusreg & EMEX) == 0 && (regdata & EMEX) == 1) {
+      if ((statusreg & EMEX) == 0 && (regdata & EMEX) != 0) {
 	triggerEmergencyExit();
       }