diff --git a/src/Autopilot/inputvalue.hxx b/src/Autopilot/inputvalue.hxx
index 40c0377ad..bdf0b6382 100644
--- a/src/Autopilot/inputvalue.hxx
+++ b/src/Autopilot/inputvalue.hxx
@@ -21,6 +21,11 @@
 #ifndef _INPUTVALUE_HXX
 #define _INPUTVALUE_HXX 1
 
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+
 #include <simgear/structure/SGExpression.hxx>
 
 namespace FGXMLAutopilot {
diff --git a/src/Autopilot/logic.hxx b/src/Autopilot/logic.hxx
index ac4591458..34c27c10d 100644
--- a/src/Autopilot/logic.hxx
+++ b/src/Autopilot/logic.hxx
@@ -23,6 +23,10 @@
 
 #include "digitalcomponent.hxx"
 
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
 namespace FGXMLAutopilot {
 
 /**