2 files changed, 4 insertions, 4 deletions
diff --git a/text.c b/text.c
index 9367bd4..b88d859 100644
--- a/text.c
+++ b/text.c
@@ -1604,11 +1604,11 @@ bool text_iterator_char_prev(Iterator *it, char *c) {
 	return true;
 }
 
-bool text_byte_get(Text *txt, size_t pos, char *byte) {
+bool text_byte_get(const Text *txt, size_t pos, char *byte) {
 	return text_bytes_get(txt, pos, 1, byte);
 }
 
-size_t text_bytes_get(Text *txt, size_t pos, size_t len, char *buf) {
+size_t text_bytes_get(const Text *txt, size_t pos, size_t len, char *buf) {
 	if (!buf)
 		return 0;
 	char *cur = buf;
diff --git a/text.h b/text.h
index 454e2fb..51d92c4 100644
--- a/text.h
+++ b/text.h
@@ -221,7 +221,7 @@ size_t text_lineno_by_pos(Text*, size_t pos);
  *           return an artificial NUL byte at EOF.
  * @endrst
  */
-bool text_byte_get(Text*, size_t pos, char *byte);
+bool text_byte_get(const Text*, size_t pos, char *byte);
 /**
  * Store at most ``len`` bytes starting from ``pos`` into ``buf``.
  * @param pos The absolute starting position.
@@ -232,7 +232,7 @@ bool text_byte_get(Text*, size_t pos, char *byte);
  * .. warning:: ``buf`` will not be NUL terminated.
  * @endrst
  */
-size_t text_bytes_get(Text*, size_t pos, size_t len, char *buf);
+size_t text_bytes_get(const Text*, size_t pos, size_t len, char *buf);
 /**
  * Fetch text range into newly allocate memory region.
  * @param pos The absolute starting position.