1 files changed, 2 insertions, 1 deletions
diff --git a/mandoc.h b/mandoc.h
index 7b7e4f41..138f783b 100644
--- a/mandoc.h
+++ b/mandoc.h
@@ -400,7 +400,8 @@ struct	man;
 __BEGIN_DECLS
 
 void		 *mandoc_calloc(size_t, size_t);
-enum mandoc_esc	  mandoc_escape(const char **, const char **, int *);
+enum mandoc_esc	  mandoc_escape(const char const **,
+			const char const **, int *);
 void		 *mandoc_malloc(size_t);
 void		 *mandoc_realloc(void *, size_t);
 char		 *mandoc_strdup(const char *);