diff --git a/src/main.cpp b/src/main.cpp
index 2410230ef..0e199fe60 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -926,11 +926,11 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
         *pfMissingInputs = false;
 
     if (!CheckTransaction(tx, state))
-        return error("AcceptToMemoryPool: : CheckTransaction failed");
+        return error("AcceptToMemoryPool: CheckTransaction failed");
 
     // Coinbase is only valid in a block, not as a loose transaction
     if (tx.IsCoinBase())
-        return state.DoS(100, error("AcceptToMemoryPool: : coinbase as individual tx"),
+        return state.DoS(100, error("AcceptToMemoryPool: coinbase as individual tx"),
                          REJECT_INVALID, "coinbase");
 
     // Rather not work on nonstandard transactions (unless -testnet/-regtest)
@@ -1000,7 +1000,7 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
 
         // Check for non-standard pay-to-script-hash in inputs
         if (Params().RequireStandard() && !AreInputsStandard(tx, view))
-            return error("AcceptToMemoryPool: : nonstandard transaction input");
+            return error("AcceptToMemoryPool: nonstandard transaction input");
 
         // Check that the transaction doesn't have an excessive number of
         // sigops, making it impossible to mine. Since the coinbase transaction
@@ -1076,7 +1076,7 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
         // can be exploited as a DoS attack.
         if (!CheckInputs(tx, state, view, true, MANDATORY_SCRIPT_VERIFY_FLAGS, true))
         {
-            return error("AcceptToMemoryPool: : BUG! PLEASE REPORT THIS! ConnectInputs failed against MANDATORY but not STANDARD flags %s", hash.ToString());
+            return error("AcceptToMemoryPool: BUG! PLEASE REPORT THIS! ConnectInputs failed against MANDATORY but not STANDARD flags %s", hash.ToString());
         }
 
         // Store transaction in memory