diff --git a/libpkgconf/libpkgconf.h b/libpkgconf/libpkgconf.h
index 50d2ba9..404bf0c 100644
--- a/libpkgconf/libpkgconf.h
+++ b/libpkgconf/libpkgconf.h
@@ -250,7 +250,7 @@ pkgconf_pkg_t *pkgconf_scan_all(pkgconf_client_t *client, void *ptr, pkgconf_pkg
 void pkgconf_pkg_dir_list_build(pkgconf_client_t *client);
 
 /* parse.c */
-pkgconf_pkg_t *pkgconf_pkg_new_from_file(const pkgconf_client_t *client, const char *path, FILE *f);
+pkgconf_pkg_t *pkgconf_pkg_new_from_file(pkgconf_client_t *client, const char *path, FILE *f);
 void pkgconf_dependency_parse_str(const pkgconf_client_t *client, pkgconf_list_t *deplist_head, const char *depends);
 void pkgconf_dependency_parse(const pkgconf_client_t *client, pkgconf_pkg_t *pkg, pkgconf_list_t *deplist_head, const char *depends);
 void pkgconf_dependency_append(pkgconf_list_t *list, pkgconf_dependency_t *tail);
diff --git a/libpkgconf/pkg.c b/libpkgconf/pkg.c
index 901f1c4..7e697d3 100644
--- a/libpkgconf/pkg.c
+++ b/libpkgconf/pkg.c
@@ -233,7 +233,7 @@ determine_prefix(const pkgconf_pkg_t *pkg)
  *    :rtype: pkgconf_pkg_t *
  */
 pkgconf_pkg_t *
-pkgconf_pkg_new_from_file(const pkgconf_client_t *client, const char *filename, FILE *f)
+pkgconf_pkg_new_from_file(pkgconf_client_t *client, const char *filename, FILE *f)
 {
 	pkgconf_pkg_t *pkg;
 	char readbuf[PKGCONF_BUFSIZE];
@@ -436,7 +436,7 @@ pkgconf_pkg_unref(pkgconf_client_t *client, pkgconf_pkg_t *pkg)
 }
 
 static inline pkgconf_pkg_t *
-pkgconf_pkg_try_specific_path(const pkgconf_client_t *client, const char *path, const char *name)
+pkgconf_pkg_try_specific_path(pkgconf_client_t *client, const char *path, const char *name)
 {
 	pkgconf_pkg_t *pkg = NULL;
 	FILE *f;