diff --git a/Astro/moon.cxx b/Astro/moon.cxx
index 6e791f5f..1c358dcf 100644
--- a/Astro/moon.cxx
+++ b/Astro/moon.cxx
@@ -113,7 +113,7 @@ void Moon::updatePosition(fgTIME *t, Star *ourSun)
     geoRa, geoDec;
   
   fgAIRCRAFT *air;
-  FGState *f;
+  FGInterface *f;
 
   air = &current_aircraft;
   f = air->fdm_state;
diff --git a/Astro/sky.cxx b/Astro/sky.cxx
index 9f3bb50c..d5e7730c 100644
--- a/Astro/sky.cxx
+++ b/Astro/sky.cxx
@@ -255,7 +255,7 @@ void fgSkyInit( void ) {
 
 // Draw the Sky
 void fgSkyRender( void ) {
-    FGState *f;
+    FGInterface *f;
     fgLIGHT *l;
     float inner_color[4];
     float middle_color[4];
@@ -362,6 +362,9 @@ void fgSkyRender( void ) {
 
 
 // $Log$
+// Revision 1.21  1999/02/05 21:28:50  curt
+// Modifications to incorporate Jon S. Berndts flight model code.
+//
 // Revision 1.20  1999/02/02 20:13:29  curt
 // MSVC++ portability changes by Bernie Bright:
 //
diff --git a/Astro/stars.cxx b/Astro/stars.cxx
index 8aae8157..8f7bdb23 100644
--- a/Astro/stars.cxx
+++ b/Astro/stars.cxx
@@ -220,7 +220,7 @@ int fgStarsInit( void ) {
 
 // Draw the Stars
 void fgStarsRender( void ) {
-    FGState *f;
+    FGInterface *f;
     fgLIGHT *l;
     fgTIME *t;
     int i;
@@ -264,6 +264,9 @@ void fgStarsRender( void ) {
 
 
 // $Log$
+// Revision 1.27  1999/02/05 21:28:52  curt
+// Modifications to incorporate Jon S. Berndts flight model code.
+//
 // Revision 1.26  1999/02/02 20:13:30  curt
 // MSVC++ portability changes by Bernie Bright:
 //