diff --git a/zdump/df_s390.h b/zdump/df_s390.h
index a9dfe45e..0abba494 100644
--- a/zdump/df_s390.h
+++ b/zdump/df_s390.h
@@ -188,7 +188,6 @@ extern void df_s390_dumper_read(struct zg_fh *fh, int32_t blk_size,
  * DASD multi-volume dumper functions
  */
 extern int dt_s390mv_init(void);
-extern void dt_s390mv_exit(void);
 extern void dt_s390mv_info(void);
 
 #endif /* DF_S390_H */