diff --git a/src/AIModel/AIModelData.cxx b/src/AIModel/AIModelData.cxx
index fe4762e83..2073a3c55 100644
--- a/src/AIModel/AIModelData.cxx
+++ b/src/AIModel/AIModelData.cxx
@@ -1,3 +1,8 @@
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
 #include "AIBase.hxx"
 #include "AIModelData.hxx"