diff --git a/Doc/reference/expressions.rst b/Doc/reference/expressions.rst
index 7adb601eed6..c958e7ab719 100644
--- a/Doc/reference/expressions.rst
+++ b/Doc/reference/expressions.rst
@@ -1687,7 +1687,7 @@ Or, when processing a file stream in chunks:
    while chunk := file.read(9000):
        process(chunk)
 
-Assignment expressions must surrounded by parentheses when used
+Assignment expressions must be surrounded by parentheses when used
 as sub-expressions in subscript, slicing, conditional, lambda,
 keyword-argument, generator, and comprehension-if expressions.  They
 can only be used as is in if and while statements and in decorators.