diff --git a/build/misc.tcl b/build/misc.tcl
index 2688affc..7d6a75f5 100644
--- a/build/misc.tcl
+++ b/build/misc.tcl
@@ -1339,6 +1339,8 @@ respond "*" ":cc c10fnm.c\r"
 respond "*" ":cc c10io.c\r"
 respond "*" ":cc c10map.c\r"
 respond "*" ":cc c10pag.c\r"
+# C10SFD is obsolete, but used by R.
+respond "*" ":cc c10sfd.c\r"
 respond "*" ":cc c10tty.c\r"
 respond "*" ":cc ac.c\r"
 respond "*" ":cc apfnam.c\r"
diff --git a/src/clib/c10sfd.c b/src/clib/c10sfd.c
index fef239f7..f9b8de7f 100644
--- a/src/clib/c10sfd.c
+++ b/src/clib/c10sfd.c
@@ -5,6 +5,8 @@
 
 **********************************************************************/
 
+#include "clib.h"
+
 char *setfdir (buf, name, dir)
 	char *buf, *name, *dir;
 
diff --git a/src/clib/clib.h b/src/clib/clib.h
index c26fa2c6..baee69e6 100644
--- a/src/clib/clib.h
+++ b/src/clib/clib.h
@@ -9,7 +9,7 @@ typedef struct {                    /* ITS filespec in sixbit */
                    fn1,                /* First filename */
                    fn2,                /* Second filename */
                    dir;                /* Directory */
-        } FILESPEC;
+        } filespec;
 
 #define TRUE       1
 #define FALSE      0