diff --git a/src/condition.cpp b/src/condition.cpp
index dd85beb..742ae9a 100644
--- a/src/condition.cpp
+++ b/src/condition.cpp
@@ -38,7 +38,7 @@ bool Condition::unavailable()
   return add(eUNAVAILABLE);
 }
 
-char *Condition::toString(char *aBuffer, int aMaxLen)
+char *Condition::toString(char*, int)
 {
   return NULL;
 }
diff --git a/src/logger.cpp b/src/logger.cpp
index 597978a..38a0b6b 100644
--- a/src/logger.cpp
+++ b/src/logger.cpp
@@ -76,7 +76,7 @@ const char *Logger::timestamp(char *aBuffer)
   gettimeofday(&tv, &tz);
 
   strftime(aBuffer, 64, "%Y-%m-%dT%H:%M:%S", gmtime(&tv.tv_sec));
-  sprintf(aBuffer + strlen(aBuffer), ".%06dZ", tv.tv_usec);
+  sprintf(aBuffer + strlen(aBuffer), ".%06ldZ", tv.tv_usec);
 #endif
   
   return aBuffer;
diff --git a/src/server.cpp b/src/server.cpp
index 676e055..47f8ef8 100755
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -211,7 +211,6 @@ Client *Server::connectToClients()
   ::memset(&timeout, 0, sizeof(timeout));
 
   Client *client = NULL;
-  bool added = false;
 
   if (::select(nfds, &rset, 0, 0, &timeout) > 0)
   {
@@ -230,7 +229,6 @@ Client *Server::connectToClients()
     ::setsockopt(socket, IPPROTO_TCP, TCP_NODELAY, (const char*) &flag, sizeof(int));
 
     client = addClient(new Client(socket));
-    added = true;
   }
 
   return client;
diff --git a/src/service.cpp b/src/service.cpp
index 0a008ef..c03c8e8 100644
--- a/src/service.cpp
+++ b/src/service.cpp
@@ -12,7 +12,7 @@ void MTConnectService::setName(const char *aName)
   mName[79] = '\0';
 }
 
-void MTConnectService::initialize(int aArgc, const char *aArgv[])
+void MTConnectService::initialize(int, const char**)
 {
   if (gLogger == NULL) {
     if (mIsService)
@@ -578,7 +578,7 @@ int MTConnectService::main(int argc, const char *argv[])
   return 0;
 } 
 
-void MTConnectService::install(int argc, const char *argv[])
+void MTConnectService::install(int, const char*[])
 {
 }
 
diff --git a/src/string_buffer.cpp b/src/string_buffer.cpp
index e582230..6fa9ea7 100755
--- a/src/string_buffer.cpp
+++ b/src/string_buffer.cpp
@@ -113,7 +113,7 @@ void StringBuffer::timestamp()
   gettimeofday(&tv, &tz);
   
   strftime(mTimestamp, 64, "%Y-%m-%dT%H:%M:%S", gmtime(&tv.tv_sec));
-  sprintf(mTimestamp + strlen(mTimestamp), ".%06dZ", tv.tv_usec);
+  sprintf(mTimestamp + strlen(mTimestamp), ".%06ldZ", tv.tv_usec);
 #endif
 }