diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index 84a2b9d..65dd625 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -472,7 +472,7 @@
    |         | from the significand, and the decimal point is also      |
    |         | removed if there are no remaining digits following it.   |
    |         |                                                          |
-   |         | Postive and negative infinity, positive and negative     |
+   |         | Positive and negative infinity, positive and negative    |
    |         | zero, and nans, are formatted as ``inf``, ``-inf``,      |
    |         | ``0``, ``-0`` and ``nan`` respectively, regardless of    |
    |         | the precision.                                           |