diff --git a/plugins/currency/ethereum/ethermine_hashrate_ b/plugins/currency/ethereum/ethermine_hashrate_
index 42cc7eba..8a210413 100755
--- a/plugins/currency/ethereum/ethermine_hashrate_
+++ b/plugins/currency/ethereum/ethermine_hashrate_
@@ -96,6 +96,7 @@ reader = codecs.getreader("utf-8")
 try:
     mining_stats = json.load(reader(mining_stats_raw))
 except ValueError:
+    # Error in decoding operation or in JSON parsing throw a ValueError
     print("Failed to parse JSON response.", file=sys.stderr)
     sys.exit(9)
 
diff --git a/plugins/currency/ethereum/etherscan_balance_ b/plugins/currency/ethereum/etherscan_balance_
index 53ecd34a..dd80be5f 100755
--- a/plugins/currency/ethereum/etherscan_balance_
+++ b/plugins/currency/ethereum/etherscan_balance_
@@ -94,6 +94,7 @@ reader = codecs.getreader("utf-8")
 try:
     etherscan_balance = json.load(reader(etherscan_balance_raw))
 except ValueError:
+    # Error in decoding operation or in JSON parsing throw a ValueError
     print("Failed to parse JSON response.", file=sys.stderr)
     sys.exit(9)