diff --git a/panda/src/parametrics/Sources.pp b/panda/src/parametrics/Sources.pp
index 6944a06dd0..f02c733057 100644
--- a/panda/src/parametrics/Sources.pp
+++ b/panda/src/parametrics/Sources.pp
@@ -28,7 +28,7 @@
      piecewiseCurve.cxx 
 
   #define IF_NURBSPP_SOURCES \
-    nurbsPPCurve.cxx nurbsPPCurve.I nurbsPPCurve.h
+    nurbsPPCurve.cxx nurbsPPCurve.h
 
   #define INSTALL_HEADERS \
     classicNurbsCurve.I classicNurbsCurve.h \
@@ -40,7 +40,7 @@
     nurbsCurve.h \
     nurbsCurveDrawer.I nurbsCurveDrawer.h \
     nurbsCurveInterface.I nurbsCurveInterface.h \
-    nurbsPPCurve.h nurbsPPCurve.I \
+    nurbsPPCurve.h \
     parametricCurve.h \
     parametricCurveCollection.I parametricCurveCollection.h \
     piecewiseCurve.h
diff --git a/panda/src/parametrics/nurbsPPCurve.I b/panda/src/parametrics/nurbsPPCurve.I
deleted file mode 100644
index e1067b1d95..0000000000
--- a/panda/src/parametrics/nurbsPPCurve.I
+++ /dev/null
@@ -1,17 +0,0 @@
-// Filename: nurbsPPCurve.I
-// Created by:  drose (02Mar01)
-//
-////////////////////////////////////////////////////////////////////
-//
-// PANDA 3D SOFTWARE
-// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
-//
-// All use of this software is subject to the terms of the Panda 3d
-// Software license.  You should have received a copy of this license
-// along with this source code; you will also find a current copy of
-// the license at http://www.panda3d.org/license.txt .
-//
-// To contact the maintainers of this program write to
-// panda3d@yahoogroups.com .
-//
-////////////////////////////////////////////////////////////////////
diff --git a/panda/src/parametrics/nurbsPPCurve.h b/panda/src/parametrics/nurbsPPCurve.h
index 293a380234..000da6c633 100644
--- a/panda/src/parametrics/nurbsPPCurve.h
+++ b/panda/src/parametrics/nurbsPPCurve.h
@@ -133,6 +133,4 @@ private:
 
 typedef NurbsPPCurve NurbsCurve;
 
-#include "nurbsPPCurve.I"
-
 #endif