X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FInstrumentation%2Fslip_skid_ball.cxx;h=b5a439158a7fb0c58fc75e27600093fc5ba8dbeb;hb=9fa790bcac7e535bb06cd228ae15178f1b10b26f;hp=4925e1fa94ca7b363c96295af9871ea410c1c41d;hpb=b9e4775a7a4bbeac9e3af2bf617ddacfbc2d47bf;p=flightgear.git

diff --git a/src/Instrumentation/slip_skid_ball.cxx b/src/Instrumentation/slip_skid_ball.cxx
index 4925e1fa9..b5a439158 100644
--- a/src/Instrumentation/slip_skid_ball.cxx
+++ b/src/Instrumentation/slip_skid_ball.cxx
@@ -3,10 +3,15 @@
 //
 // This file is in the Public Domain and comes with no warranty.
 
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
 #include "slip_skid_ball.hxx"
 #include <Main/fg_props.hxx>
 #include <Main/util.hxx>
 
+using std::string;
 
 SlipSkidBall::SlipSkidBall ( SGPropertyNode *node)
     :