diff --git a/src/libCom/osi/os/Linux/osiUnistd.h b/src/libCom/osi/os/Linux/osiUnistd.h
new file mode 100644
index 000000000..efa92cb16
--- /dev/null
+++ b/src/libCom/osi/os/Linux/osiUnistd.h
@@ -0,0 +1,25 @@
+/*  
+ *  $Id$
+ *
+ *                              
+ *                    L O S  A L A M O S
+ *              Los Alamos National Laboratory
+ *               Los Alamos, New Mexico 87545
+ *                                  
+ *  Copyright, 1986, The Regents of the University of California.
+ *                                  
+ *           
+ *	Author Jeffrey O. Hill
+ *	johill@lanl.gov
+ *	505 665 1831
+ */
+
+#include <unistd.h>
+
+/*
+ * Some systems fail to provide prototypes of these functions.
+ * Others provide different prototypes.
+ * There seems to be no way to handle this automatically, so
+ * if you get compile errors, just make the appropriate changes here.
+ */
+int putenv (char *);
diff --git a/src/libCom/osi/os/RTEMS/osiUnistd.h b/src/libCom/osi/os/RTEMS/osiUnistd.h
new file mode 100644
index 000000000..96c244efd
--- /dev/null
+++ b/src/libCom/osi/os/RTEMS/osiUnistd.h
@@ -0,0 +1,26 @@
+/*  
+ *  $Id$
+ *
+ *                              
+ *                    L O S  A L A M O S
+ *              Los Alamos National Laboratory
+ *               Los Alamos, New Mexico 87545
+ *                                  
+ *  Copyright, 1986, The Regents of the University of California.
+ *                                  
+ *           
+ *	Author Jeffrey O. Hill
+ *	johill@lanl.gov
+ *	505 665 1831
+ */
+
+#include <unistd.h>
+
+/*
+ * Some systems fail to provide prototypes of these functions.
+ * Others provide different prototypes.
+ * There seems to be no way to handle this automatically, so
+ * if you get compile errors, just make the appropriate changes here.
+ */
+int putenv (char *);
+char *strdup (const char *);