diff --git a/ds/string.c b/ds/string.c
index a6e4baf..179e2f2 100644
--- a/ds/string.c
+++ b/ds/string.c
@@ -1700,7 +1700,7 @@ int b_string_iterator_begin(const b_string *string, b_string_iterator *it)
 		return -1;
 	}
 
-	const char *s = string_ptr(it->_s_p);
+	const char *s = string_ptr(p);
 	it->_m = ITERATOR_MODE_CHARS;
 	it->_s_p = p;
 	it->char_value = utf8_codepoint_decode(s);