diff --git a/book/05-distributed-git/sections/maintaining.asc b/book/05-distributed-git/sections/maintaining.asc
index d8ab9c275..44cab8061 100644
--- a/book/05-distributed-git/sections/maintaining.asc
+++ b/book/05-distributed-git/sections/maintaining.asc
@@ -282,12 +282,12 @@ or, more concisely:
 $ git diff $(git merge-base contrib master)
 ----
 
-However, neither of those is particularly convenient, so Git provides another shorthand for doing the same thing: the double-dot syntax.
-In the context of the `git diff` command, you can put two periods after another branch to do a `diff` between the last commit of the branch you're on and its common ancestor with another branch:
+However, neither of those is particularly convenient, so Git provides another shorthand for doing the same thing: the triple-dot syntax.
+In the context of the `git diff` command, you can put three periods after another branch to do a `diff` between the last commit of the branch you're on and its common ancestor with another branch:
 
 [source,console]
 ----
-$ git diff master..contrib
+$ git diff master...contrib
 ----
 
 This command shows you only the work your current topic branch has introduced since its common ancestor with master.