diff --git a/downloadPOSIX.sh b/downloadPOSIX.sh
index 49406b0..f44879e 100755
--- a/downloadPOSIX.sh
+++ b/downloadPOSIX.sh
@@ -1,6 +1,7 @@
 #!/bin/sh
-# Don't link mrsh to sh, since it does not allow line continuations
-# in here-documents. Use dash, yash, bash, posh, ksh, mksh, zsh, pbosh
+# Don't link mrsh to sh, since it does not allow line continuations in here-documents.
+# Don't use tcsh, it doesn't allow multiple lines in braced or parenthesized blocks.
+# Use dash, yash, bash, posh, ksh, mksh, zsh, pbosh
 
 # Run entire script in subshell to prevent variable pollution
 (