diff --git a/completion.d/aws b/completion.d/aws
index 9b5591c..6fd4c32 100644
--- a/completion.d/aws
+++ b/completion.d/aws
@@ -1,6 +1,5 @@
 #!/bin/bash
 
-if ( which aws && which aws_completer ) &> /dev/null
-then
+if (command -v aws && command -v aws_completer) &>/dev/null; then
   complete -C aws_completer aws
 fi