diff --git a/src/ATC/AIMgr.cxx b/src/ATC/AIMgr.cxx
index 9eba82b1f..a1f9a2dff 100644
--- a/src/ATC/AIMgr.cxx
+++ b/src/ATC/AIMgr.cxx
@@ -23,8 +23,8 @@
 #include <Main/fgfs.hxx>
 #include <Main/fg_props.hxx>
 #include <Main/globals.hxx>
-#include <Simgear/misc/sg_path.hxx>
-#include <Simgear/bucket/newbucket.hxx>
+#include <simgear/misc/sg_path.hxx>
+#include <simgear/bucket/newbucket.hxx>
 
 #include <list>
 
diff --git a/src/ATC/AIMgr.hxx b/src/ATC/AIMgr.hxx
index 8b002744f..ff684595e 100644
--- a/src/ATC/AIMgr.hxx
+++ b/src/ATC/AIMgr.hxx
@@ -27,7 +27,7 @@
 
 #include <list>
 
-#include "ATCMgr.hxx"
+#include "ATCmgr.hxx"
 #include "AIEntity.hxx"
 
 SG_USING_STD(list);