diff --git a/docs/03.API-EXAMPLE.md b/docs/03.API-EXAMPLE.md
index 936951f38..1ffe2e8d8 100644
--- a/docs/03.API-EXAMPLE.md
+++ b/docs/03.API-EXAMPLE.md
@@ -232,7 +232,7 @@ print_value (const jerry_value_t value)
   {
     /* Determining required buffer size */
     jerry_size_t req_sz = jerry_get_string_size (value);
-    jerry_char_t str_buf_p[req_sz];
+    jerry_char_t str_buf_p[req_sz + 1];
 
     jerry_string_to_char_buffer (value, str_buf_p, req_sz);
     str_buf_p[req_sz] = '\0';