diff --git a/examples/reading-files/reading-files.go b/examples/reading-files/reading-files.go
index f07b186..5a930a3 100644
--- a/examples/reading-files/reading-files.go
+++ b/examples/reading-files/reading-files.go
@@ -32,7 +32,8 @@ func main() {
     // parts of a file are read. For these tasks, start
     // by `Open`ing a file to obtain an `os.File` value.
     f, err := os.Open("/tmp/dat")
-
+    check(err)
+    
     // Read some bytes from the beginning of the file.
     // Allow up to 5 to be read but also note how many
     // actually were read.