--- a/libjbig/jbig.h
+++ b/libjbig/jbig.h
@@ -307,5 +309,6 @@
                                         const unsigned char *src, unsigned char **dest,
                                         int use_graycode);
 extern JBIGEXPORT int jbg_newlen(unsigned char *bie, size_t len);
+extern JBIGEXPORT unsigned char *jbg_next_pscdms(unsigned char *p, size_t len);

 #endif /* JBG_H */
