diff --git a/lib/roken/parse_units.h b/lib/roken/parse_units.h
index 3601839f3..7c4462fb2 100644
--- a/lib/roken/parse_units.h
+++ b/lib/roken/parse_units.h
@@ -41,6 +41,7 @@
 #ifndef __PARSE_UNITS_H__
 #define __PARSE_UNITS_H__
 
+#include <stdio.h>
 #include <stddef.h>
 
 struct units {
@@ -54,6 +55,9 @@ int
 parse_units (const char *s, const struct units *units,
 	     const char *def_unit);
 
+void
+print_units_table (const struct units *units, FILE *f);
+
 int
 parse_flags (const char *s, const struct units *units,
 	     int orig);
@@ -64,4 +68,7 @@ unparse_units (int num, const struct units *units, char *s, size_t len);
 size_t
 unparse_flags (int num, const struct units *units, char *s, size_t len);
 
+void
+print_flags_table (const struct units *units, FILE *f);
+
 #endif /* __PARSE_UNITS_H__ */