diff --git a/FDM/Makefile.am b/FDM/Makefile.am
index 80ad393be..f2055d01e 100644
--- a/FDM/Makefile.am
+++ b/FDM/Makefile.am
@@ -2,6 +2,6 @@ SUBDIRS	= LaRCsim Slew
 
 noinst_LIBRARIES = libFlight.a
 
-libFlight_a_SOURCES = flight.c flight.h
+libFlight_a_SOURCES = flight.cxx flight.hxx
 
 INCLUDES += -I$(top_builddir) -I$(top_builddir)/Lib -I$(top_builddir)/Simulator
diff --git a/FDM/flight.c b/FDM/flight.cxx
similarity index 98%
rename from FDM/flight.c
rename to FDM/flight.cxx
index ff281ec92..46b99669f 100644
--- a/FDM/flight.c
+++ b/FDM/flight.cxx
@@ -119,6 +119,9 @@ int fgFlightModelSetAltitude(int model, fgFLIGHT *f, double alt_meters) {
 
 
 // $Log$
+// Revision 1.1  1998/10/16 20:16:41  curt
+// Renamed flight.[ch] to flight.[ch]xx
+//
 // Revision 1.19  1998/09/29 14:57:38  curt
 // c++-ified comments.
 //
diff --git a/FDM/flight.h b/FDM/flight.hxx
similarity index 99%
rename from FDM/flight.h
rename to FDM/flight.hxx
index 202301623..f9c077f4c 100644
--- a/FDM/flight.h
+++ b/FDM/flight.hxx
@@ -415,6 +415,9 @@ int fgFlightModelSetAltitude(int model, fgFLIGHT *f, double alt_meters);
 
 
 // $Log$
+// Revision 1.1  1998/10/16 20:16:44  curt
+// Renamed flight.[ch] to flight.[ch]xx
+//
 // Revision 1.20  1998/09/29 14:57:39  curt
 // c++-ified comments.
 //