diff --git a/CHANGELOG.md b/CHANGELOG.md
index 006bdf9..cbbd5fb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,7 +14,7 @@ Expected: June 2024
 
 ### Features
 
-* Added history callbacks API
+* Added history callbacks API: `cligen_hist_fn_set`
   * Added history subsection in tutorial
 * Changed intermediate version numbers to be git-style, eg `7.0.0-39` instead of `7.1.0-PRE`
 
diff --git a/cligen_getline.c b/cligen_getline.c
index 56b0e75..5ffbf1c 100644
--- a/cligen_getline.c
+++ b/cligen_getline.c
@@ -55,7 +55,7 @@ static void     gl_init1(void);         /* prepare to edit a line */
 static void     gl_cleanup(void);       /* to undo gl_init1 */
 void            gl_char_init(void);     /* get ready for no echo input */
 void            gl_char_cleanup(void);  /* undo gl_char_init */
-static size_t   (*gl_strlen)() = (size_t(*)())strlen;
+static size_t   (*gl_strlen)(const char *) = (size_t(*)())strlen;
                                         /* returns printable prompt width */
 
 static int      gl_addchar(cligen_handle h, int c);     /* install specified char */