diff --git a/src/primitives/array.md b/src/primitives/array.md
index 704a2131c7..e1c303ace4 100644
--- a/src/primitives/array.md
+++ b/src/primitives/array.md
@@ -63,7 +63,7 @@ fn main() {
         }
     }
 
-    // Out of bound indexing on array causes compile time error.
+    // Out of bound indexing on array with constant value causes compile time error.
     //println!("{}", xs[5]);
     // Out of bound indexing on slice causes runtime error.
     //println!("{}", xs[..][5]);