diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 78a27995888..b3c21fe30c7 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -1954,7 +1954,7 @@ The constructors for both classes work the same:
 
    .. method:: set < other
 
-      Test whether the set is a true subset of *other*, that is,
+      Test whether the set is a proper subset of *other*, that is,
       ``set <= other and set != other``.
 
    .. method:: issuperset(other)
@@ -1964,7 +1964,7 @@ The constructors for both classes work the same:
 
    .. method:: set > other
 
-      Test whether the set is a true superset of *other*, that is, ``set >=
+      Test whether the set is a proper superset of *other*, that is, ``set >=
       other and set != other``.
 
    .. method:: union(other, ...)