diff --git a/ORCACDefs/ctype.h b/ORCACDefs/ctype.h
index f3509d5..f51dc96 100644
--- a/ORCACDefs/ctype.h
+++ b/ORCACDefs/ctype.h
@@ -28,6 +28,33 @@ extern char __ctype[],__ctype2[];
 #define __csymf         0x02
 #define __octal         0x04
 
+
+int             isalnum(int);
+int             isalpha(int);
+#ifndef __KeepNamespacePure__
+   int          isascii(int);
+#endif
+int             iscntrl(int);
+#ifndef __KeepNamespacePure__
+   int          iscsym(int);
+   int          iscsymf(int);
+#endif
+int             isdigit(int);
+int             isgraph(int);
+int             islower(int);
+#ifndef __KeepNamespacePure__
+   int          isodigit(int);
+#endif
+int             isprint(int);
+int             ispunct(int);
+int             isspace(int);
+int             isupper(int);
+int             isxdigit(int);
+#ifndef __KeepNamespacePure__
+   int          toascii(int);
+#endif
+
+
 #define isalnum(c)      ((__ctype)[(c)+1] & (__upper|__lower|__digit))
 #define isalpha(c)      ((__ctype)[(c)+1] & (__upper|__lower))
 #ifndef __KeepNamespacePure__
diff --git a/ORCACDefs/stdio.h b/ORCACDefs/stdio.h
index 4fc1bc5..679e9cb 100644
--- a/ORCACDefs/stdio.h
+++ b/ORCACDefs/stdio.h
@@ -103,6 +103,9 @@ typedef long fpos_t;
  *  Functions declared as macros
  */
 
+void            setbuf(FILE *, char *);
+void            rewind(FILE *);
+
 #define setbuf(stream,buf)      ((buf==NULL) ? (void) __setvbuf(stream,NULL,_IONBF,0l) : (void) __setvbuf(stream,buf,_IOFBF,(size_t) BUFSIZ))
 #define rewind(stream)          (__fseek((stream),0L,SEEK_SET))