diff --git a/2018-edition/src/ch04-03-slices.md b/2018-edition/src/ch04-03-slices.md
index 5bf3fec30..8cac17aba 100644
--- a/2018-edition/src/ch04-03-slices.md
+++ b/2018-edition/src/ch04-03-slices.md
@@ -158,7 +158,7 @@ in the slice and `ending_index` is one more than the last position in the
 slice. Internally, the slice data structure stores the starting position and
 the length of the slice, which corresponds to `ending_index` minus
 `starting_index`. So in the case of `let world = &s[6..11];`, `world` would be
-a slice that contains a pointer to the 6th byte of `s` and a length value of 5.
+a slice that contains a pointer to the 7th byte of `s` and a length value of 5.
 
 Figure 4-6 shows this in a diagram.