diff --git a/runtime/doc/usr_41.txt b/runtime/doc/usr_41.txt
index 435002b..eb269e1 100644
--- a/runtime/doc/usr_41.txt
+++ b/runtime/doc/usr_41.txt
@@ -162,7 +162,7 @@
 negative, while it is actually seen as a subtraction.
 
 To actually have the minus sign be used for negation, you can put the second
-expression in parenthesis: >
+expression in parentheses: >
 
 	echo -0x7f (-0o36)