diff --git a/src/LedgerTiming.h b/src/LedgerTiming.h
index 9f5cfa903..eb8f2d56c 100644
--- a/src/LedgerTiming.h
+++ b/src/LedgerTiming.h
@@ -5,8 +5,9 @@
 #	define LEDGER_IDLE_INTERVAL		15
 
 // The number of seconds a validation remains current after its ledger's close time
-// This is a safety to protect against very old validations
-#	define LEDGER_MAX_INTERVAL		(LEDGER_IDLE_INTERVAL * 32)
+// This is a safety to protect against very old validations and the time it takes to adjust
+// the close time accuracy window
+#	define LEDGER_VAL_INTERVAL		600
 
 // The number of seconds before a close time that we consider a validation acceptable
 // This protects against extreme clock errors
diff --git a/src/ValidationCollection.cpp b/src/ValidationCollection.cpp
index 68c54fc86..41c772f81 100644
--- a/src/ValidationCollection.cpp
+++ b/src/ValidationCollection.cpp
@@ -14,7 +14,7 @@ bool ValidationCollection::addValidation(SerializedValidation::pointer val)
 		val->setTrusted();
 		uint32 now = theApp->getOPs().getCloseTimeNC();
 		uint32 valClose = val->getCloseTime();
-		if ((now > (valClose - LEDGER_EARLY_INTERVAL)) && (now < (valClose + LEDGER_MAX_INTERVAL)))
+		if ((now > (valClose - LEDGER_EARLY_INTERVAL)) && (now < (valClose + LEDGER_VAL_INTERVAL)))
 			isCurrent = true;
 		else
 			Log(lsWARNING) << "Received stale validation now=" << now << ", close=" << valClose;
@@ -81,7 +81,7 @@ void ValidationCollection::getValidationCount(const uint256& ledger, bool curren
 			if (isTrusted && currentOnly)
 			{
 				uint32 closeTime = vit->second->getCloseTime();
-				if ((now < (closeTime - LEDGER_EARLY_INTERVAL)) || (now > (closeTime + LEDGER_MAX_INTERVAL)))
+				if ((now < (closeTime - LEDGER_EARLY_INTERVAL)) || (now > (closeTime + LEDGER_VAL_INTERVAL)))
 					isTrusted = false;
 			}
 			if (isTrusted)
@@ -133,13 +133,13 @@ boost::unordered_map<uint256, int> ValidationCollection::getCurrentValidations()
 		{
 			ValidationPair& pair = it->second;
 
-			if (pair.oldest && (now > (pair.oldest->getCloseTime() + LEDGER_MAX_INTERVAL)))
+			if (pair.oldest && (now > (pair.oldest->getCloseTime() + LEDGER_VAL_INTERVAL)))
 			{
 				mStaleValidations.push_back(pair.oldest);
 				pair.oldest = SerializedValidation::pointer();
 				condWrite();
 			}
-			if (pair.newest && (now > (pair.newest->getCloseTime() + LEDGER_MAX_INTERVAL)))
+			if (pair.newest && (now > (pair.newest->getCloseTime() + LEDGER_VAL_INTERVAL)))
 			{
 				mStaleValidations.push_back(pair.newest);
 				pair.newest = SerializedValidation::pointer();