diff --git a/src/corelib/text/qbytearray.cpp b/src/corelib/text/qbytearray.cpp
index cd999d28f8d..a1ad120520f 100644
--- a/src/corelib/text/qbytearray.cpp
+++ b/src/corelib/text/qbytearray.cpp
@@ -123,6 +123,10 @@ char *qstrcpy(char *dst, const char *src)
 
     \note If \a dst and \a src overlap, the behavior is undefined.
 
+    \note Unlike strncpy(), this function does \e not write '\\0' to all \a
+    len bytes of \a dst, but stops after the terminating '\\0'. In this sense,
+    it's similar to C11's strncpy_s().
+
     \sa qstrcpy()
 */