diff --git a/fs/ext2/ext2fs.c b/fs/ext2/ext2fs.c
index a88cf8704180261dc17559ca69d2ca3abbcbd203..e119e1388fdde57a7f82cc35317ba8abb33cc658 100644
--- a/fs/ext2/ext2fs.c
+++ b/fs/ext2/ext2fs.c
@@ -749,7 +749,7 @@ int ext2fs_find_file
 }
 
 
-int ext2fs_ls (char *dirname) {
+int ext2fs_ls (const char *dirname) {
 	ext2fs_node_t dirnode;
 	int status;
 
@@ -769,7 +769,7 @@ int ext2fs_ls (char *dirname) {
 }
 
 
-int ext2fs_open (char *filename) {
+int ext2fs_open (const char *filename) {
 	ext2fs_node_t fdiro = NULL;
 	int status;
 	int len;
diff --git a/include/ext2fs.h b/include/ext2fs.h
index de935b093b81ac1f11a7057aabee192ecc0bed28..163a9bbc0e0421a03f0a5dc2c4074c0886a19dae 100644
--- a/include/ext2fs.h
+++ b/include/ext2fs.h
@@ -74,8 +74,8 @@ typedef enum
 
 
 extern int ext2fs_set_blk_dev(block_dev_desc_t *rbdd, int part);
-extern int ext2fs_ls (char *dirname);
-extern int ext2fs_open (char *filename);
+extern int ext2fs_ls (const char *dirname);
+extern int ext2fs_open (const char *filename);
 extern int ext2fs_read (char *buf, unsigned len);
 extern int ext2fs_mount (unsigned part_length);
 extern int ext2fs_close(void);