diff --git a/SC2109.md b/SC2109.md
index 45b34a7..a1aa9c3 100644
--- a/SC2109.md
+++ b/SC2109.md
@@ -14,7 +14,7 @@
 
 ### Rationale:
 
-`||` can not be used in a `[ .. ]` test expression. Instead, make two `[ .. ]` expressions and put the `||` between them.
+`||` cannot be used in a `[ .. ]` test expression. Instead, make two `[ .. ]` expressions and put the `||` between them.
 
 ### Exceptions: