2 files changed, 2 insertions, 2 deletions
diff --git a/text.c b/text.c
index b5c552e..3fcc1d0 100644
--- a/text.c
+++ b/text.c
@@ -1379,7 +1379,7 @@ bool text_modified(const Text *txt) {
 	return txt->saved_revision != txt->history;
 }
 
-bool text_mmaped(Text *txt, const char *ptr) {
+bool text_mmaped(const Text *txt, const char *ptr) {
 	uintptr_t addr = (uintptr_t)ptr;
 	for (size_t i = 0, len = array_length(&txt->blocks); i < len; i++) {
 		Block *blk = array_get_ptr(&txt->blocks, i);
diff --git a/text.h b/text.h
index cf32513..8241df0 100644
--- a/text.h
+++ b/text.h
@@ -411,7 +411,7 @@ ssize_t text_write_range(const Text*, const Filerange*, int fd);
  * Check whether ``ptr`` is part of a memory mapped region associated with
  * this text instance.
  */
-bool text_mmaped(Text*, const char *ptr);
+bool text_mmaped(const Text*, const char *ptr);
 /** @} */
 
 #endif