diff --git a/libselinux/src/booleans.c b/libselinux/src/booleans.c
index b3ea3623..a6d46fea 100644
--- a/libselinux/src/booleans.c
+++ b/libselinux/src/booleans.c
@@ -55,6 +55,7 @@ int security_get_boolean_names(char ***names, int *len)
 	snprintf(path, sizeof path, "%s%s", selinux_mnt, SELINUX_BOOL_DIR);
 	*len = scandir(path, &namelist, &filename_select, alphasort);
 	if (*len <= 0) {
+		errno = ENOENT;
 		return -1;
 	}