diff --git a/Include/stringobject.h b/Include/stringobject.h
index 5f8a6f0..ef8f545 100644
--- a/Include/stringobject.h
+++ b/Include/stringobject.h
@@ -28,7 +28,7 @@
    Interning strings (ob_sstate) tries to ensure that only one string
    object with a given value exists, so equality tests can be one pointer
    comparison.  This is generally restricted to strings that "look like"
-   Python identifiers, although the intern() builtin can be used to force
+   Python identifiers, although the sys.intern() function can be used to force
    interning of any string.
    Together, these sped the interpreter by up to 20%. */