diff --git a/cos_117.cfg b/cos_117.cfg
index c6e380c..7bf1b55 100644
--- a/cos_117.cfg
+++ b/cos_117.cfg
@@ -144,6 +144,7 @@ IopClusters {
 								Interrupt 1
 								Name CK0
 								ResponseTimeout 500
+								YearOffset 30
 							}
 						}
 						;UseDummyDevices yes
diff --git a/simulator/sim_lib/iop_expander.cpp b/simulator/sim_lib/iop_expander.cpp
index 455480d..1ffe592 100644
--- a/simulator/sim_lib/iop_expander.cpp
+++ b/simulator/sim_lib/iop_expander.cpp
@@ -556,7 +556,7 @@ IopExpClockDevice_c::IopExpClockDevice_c(const Configuration_c &aConfig, IopChan
 	mPrimaryChannelIdx(aConfig.get<uint16_t>("PrimaryChannelIdx")),
 	mRequestChannelIdx(aConfig.get<uint16_t>("RequestChannelIdx", mPrimaryChannelIdx+1)),
 	mResponseChannelIdx(aConfig.get<uint16_t>("ResponseChannelIdx", mPrimaryChannelIdx+0)),
-	mYearOffset(aConfig.get<uint16_t>("YearOffset", 20))
+	mYearOffset(aConfig.get<uint16_t>("YearOffset", 30))
 {
 	for(size_t i=0;i<sizeof(mInterruptActive)/sizeof(bool);++i) mInterruptActive[i] = false;
 	mLogger.SetParent(mParent.GetLogger());