diff --git a/consensus/ethash/consensus.go b/consensus/ethash/consensus.go
index e29803562d..007c7aeb1e 100644
--- a/consensus/ethash/consensus.go
+++ b/consensus/ethash/consensus.go
@@ -335,6 +335,13 @@ var (
 )
 
 // EGEM Era Difficulty Algo
+// Per block calculation.
+//
+// 50% Adjustment from 0 - 5000
+// 20% Adjustment from 5001 - 10,000,000
+// 15% Adjustment from 10,000,001 - 20,000,000
+// 10% Adjusment from 20,000,001 +
+//
 
 func calcDifficultyEGEM(time uint64, parent *types.Header) *big.Int {
 	diff := new(big.Int)