diff --git a/SC2013.md b/SC2013.md
index c405c49..948005c 100644
--- a/SC2013.md
+++ b/SC2013.md
@@ -12,7 +12,7 @@ done
 ### Correct code:
 
 ```sh
-grep -v '^ *#' < file | while IFS= read -r line
+grep -v '^ *#' file | while IFS= read -r line
 do
   echo "Line: $line"
 done
@@ -24,14 +24,14 @@ or without a subshell (bash, zsh, ksh):
 while IFS= read -r line
 do
   echo "Line: $line"
-done < <(grep -v '^ *#' < file)
+done < <(grep -v '^ *#' file)
 ```
 
 or without a subshell, with a pipe (more portable, but write a file on the filesystem):
 
 ```sh
 mkfifo mypipe
-grep -v '^ *#' < file > mypipe &
+grep -v '^ *#' file > mypipe &
 while IFS= read -r line
 do
   echo "Line: $line"