Typo fix.
diff --git a/Doc/library/decimal.rst b/Doc/library/decimal.rst
index 30467c8..d989e3f 100644
--- a/Doc/library/decimal.rst
+++ b/Doc/library/decimal.rst
@@ -377,7 +377,7 @@
 
    The integer division operator ``//`` behaves analogously, returning the
    integer part of the true quotient (truncating towards zero) rather than its
-   floor, so as to preseve the usual identity ``x == (x // y) * y + x % y``::
+   floor, so as to preserve the usual identity ``x == (x // y) * y + x % y``::
 
       >>> -7 // 4
       -2