diff --git a/src/Main/fg_init.cxx b/src/Main/fg_init.cxx
index edf601347..f60846a90 100644
--- a/src/Main/fg_init.cxx
+++ b/src/Main/fg_init.cxx
@@ -1421,11 +1421,11 @@ void fgInitFDM() {
         cur_fdm_state = new FGADA( dt );
     } else if ( model == "acms" ) {
         cur_fdm_state = new FGACMS( dt );
-#endif
     } else if ( model == "balloon" ) {
         cur_fdm_state = new FGBalloonSim( dt );
     } else if ( model == "magic" ) {
         cur_fdm_state = new FGMagicCarpet( dt );
+#endif
     } else if ( model == "ufo" ) {
         cur_fdm_state = new FGUFO( dt );
     } else if ( model == "external" ) {