diff --git a/src/util/FormatString.hxx b/src/util/FormatString.hxx
index e1ecc8500..465ac7956 100644
--- a/src/util/FormatString.hxx
+++ b/src/util/FormatString.hxx
@@ -27,16 +27,14 @@
 template<typename T> class AllocatedString;
 
 /**
- * Format into a newly allocated string.  The caller frees the return
- * value with delete[].
+ * Format into an #AllocatedString.
  */
 gcc_nonnull_all
 AllocatedString<char>
 FormatStringV(const char *fmt, std::va_list args) noexcept;
 
 /**
- * Format into a newly allocated string.  The caller frees the return
- * value with delete[].
+ * Format into an #AllocatedString.
  */
 gcc_nonnull(1) gcc_printf(1,2)
 AllocatedString<char>