diff --git a/src/port/snprintf.c b/src/port/snprintf.c
index 83a8103..17dc505 100644
--- a/src/port/snprintf.c
+++ b/src/port/snprintf.c
@@ -313,6 +313,14 @@ flushbuffer(PrintfTarget *target)
 			target->failed = true;
 	}
 	target->bufptr = target->bufstart;
+	/*
+	 * Sometimes the output to stdout on Windows on multicore machines 
+	 * does not go through after connecting and disconnecting to the server 
+	 * using the PQconnectdbParams and PQfinish functions.
+	*/
+#ifdef WIN32
+	fflush(target->stream);
+#endif
 }