diff --git a/NXDNGateway/Log.cpp b/NXDNGateway/Log.cpp
index 5d80ca4..752601e 100644
--- a/NXDNGateway/Log.cpp
+++ b/NXDNGateway/Log.cpp
@@ -161,7 +161,7 @@ void Log(unsigned int level, const char* fmt, ...)
 
 	struct tm* tm = ::gmtime(&now.tv_sec);
 
-	::sprintf(buffer, "%c: %04d-%02d-%02d %02d:%02d:%02d.%03ld ", LEVELS[level], tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec, now.tv_usec / 1000L);
+	::sprintf(buffer, "%c: %04d-%02d-%02d %02d:%02d:%02d.%03lld ", LEVELS[level], tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec, now.tv_usec / 1000LL);
 #endif
 
 	va_list vl;
diff --git a/NXDNReflector/Log.cpp b/NXDNReflector/Log.cpp
index 5d80ca4..752601e 100644
--- a/NXDNReflector/Log.cpp
+++ b/NXDNReflector/Log.cpp
@@ -161,7 +161,7 @@ void Log(unsigned int level, const char* fmt, ...)
 
 	struct tm* tm = ::gmtime(&now.tv_sec);
 
-	::sprintf(buffer, "%c: %04d-%02d-%02d %02d:%02d:%02d.%03ld ", LEVELS[level], tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec, now.tv_usec / 1000L);
+	::sprintf(buffer, "%c: %04d-%02d-%02d %02d:%02d:%02d.%03lld ", LEVELS[level], tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec, now.tv_usec / 1000LL);
 #endif
 
 	va_list vl;