diff --git a/dependency-test.sh b/dependency-test.sh
index 23eafae7..3e96965f 100755
--- a/dependency-test.sh
+++ b/dependency-test.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env sh
 
-# Compatible with  bash  dash  zsh  mksh
+# Compatible with  bash  dash  zsh   mksh  ksh    ksh93
 # but not with     fish
 # problematic with tcsh  csh