diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index 7dbf41e..6b88d61 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -266,7 +266,7 @@
    +------------------------------+------------------------------------------+
    | :const:`no_site`             | -S                                       |
    +------------------------------+------------------------------------------+
-   | :const:`ingnore_environment` | -E                                       |
+   | :const:`ignore_environment`  | -E                                       |
    +------------------------------+------------------------------------------+
    | :const:`tabcheck`            | -t or -tt                                |
    +------------------------------+------------------------------------------+