diff --git a/src/init.cpp b/src/init.cpp
index 7c3c18acd29..a079dce5bc0 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -312,7 +312,7 @@ std::string HelpMessage(HelpMessageMode mode)
     strUsage += HelpMessageOpt("-conf=<file>", strprintf(_("Specify configuration file (default: %s)"), "bitcoin.conf"));
     if (mode == HMM_BITCOIND)
     {
-#if !defined(WIN32)
+#ifndef WIN32
         strUsage += HelpMessageOpt("-daemon", _("Run in the background as a daemon and accept commands"));
 #endif
     }
@@ -329,7 +329,7 @@ std::string HelpMessage(HelpMessageMode mode)
             "Warning: Reverting this setting requires re-downloading the entire blockchain. "
             "(default: 0 = disable pruning blocks, >%u = target size in MiB to use for block files)"), MIN_DISK_SPACE_FOR_BLOCK_FILES / 1024 / 1024));
     strUsage += HelpMessageOpt("-reindex", _("Rebuild block chain index from current blk000??.dat files on startup"));
-#if !defined(WIN32)
+#ifndef WIN32
     strUsage += HelpMessageOpt("-sysperms", _("Create new files with system default permissions, instead of umask 077 (only effective with disabled wallet functionality)"));
 #endif
     strUsage += HelpMessageOpt("-txindex", strprintf(_("Maintain a full transaction index, used by the getrawtransaction rpc call (default: %u)"), 0));
@@ -852,7 +852,7 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
 
     fServer = GetBoolArg("-server", false);
 
-    // block pruning; get the amount of disk space (in MB) to allot for block & undo files
+    // block pruning; get the amount of disk space (in MiB) to allot for block & undo files
     int64_t nSignedPruneTarget = GetArg("-prune", 0) * 1024 * 1024;
     if (nSignedPruneTarget < 0) {
         return InitError(_("Prune cannot be configured with a negative value."));
@@ -860,7 +860,7 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
     nPruneTarget = (uint64_t) nSignedPruneTarget;
     if (nPruneTarget) {
         if (nPruneTarget < MIN_DISK_SPACE_FOR_BLOCK_FILES) {
-            return InitError(strprintf(_("Prune configured below the minimum of %d MB.  Please use a higher number."), MIN_DISK_SPACE_FOR_BLOCK_FILES / 1024 / 1024));
+            return InitError(strprintf(_("Prune configured below the minimum of %d MiB.  Please use a higher number."), MIN_DISK_SPACE_FOR_BLOCK_FILES / 1024 / 1024));
         }
         LogPrintf("Prune configured to target %uMiB on disk for block and undo files.\n", nPruneTarget / 1024 / 1024);
         fPruneMode = true;
@@ -1036,7 +1036,7 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
         if (!warningString.empty())
             InitWarning(warningString);
         if (!errorString.empty())
-            return InitError(warningString);
+            return InitError(errorString);
 
     } // (!fDisableWallet)
 #endif // ENABLE_WALLET
@@ -1560,7 +1560,7 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
     // Generate coins in the background
     GenerateBitcoins(GetBoolArg("-gen", false), GetArg("-genproclimit", 1), Params());
 
-    // ********************************************************* Step 11: finished
+    // ********************************************************* Step 12: finished
 
     SetRPCWarmupFinished();
     uiInterface.InitMessage(_("Done loading"));
diff --git a/src/rpcmining.cpp b/src/rpcmining.cpp
index 91de37fdccf..8dd0ff2f7e5 100644
--- a/src/rpcmining.cpp
+++ b/src/rpcmining.cpp
@@ -119,6 +119,7 @@ UniValue generate(const UniValue& params, bool fHelp)
             "generate numblocks\n"
             "\nMine blocks immediately (before the RPC call returns)\n"
             "\nNote: this function can only be used on the regtest network\n"
+            "\nArguments:\n"
             "1. numblocks    (numeric, required) How many blocks are generated immediately.\n"
             "\nResult\n"
             "[ blockhashes ]     (array) hashes of blocks generated\n"