diff --git a/changelogs/fragments/204_csh_shell.yml b/changelogs/fragments/204_csh_shell.yml
new file mode 100644
index 0000000000..6d157a8337
--- /dev/null
+++ b/changelogs/fragments/204_csh_shell.yml
@@ -0,0 +1,3 @@
+---
+bugfixes:
+- csh - define ``ECHO`` and ``COMMAND_SEP`` (https://github.com/ansible-collections/ansible.posix/issues/204).
diff --git a/plugins/shell/csh.py b/plugins/shell/csh.py
index 18dee95774..bce5734060 100644
--- a/plugins/shell/csh.py
+++ b/plugins/shell/csh.py
@@ -26,6 +26,10 @@ class ShellModule(ShellBase):
     # Family of shells this has.  Must match the filename without extension
     SHELL_FAMILY = 'csh'
 
+    # commonly used
+    ECHO = 'echo'
+    COMMAND_SEP = ';'
+
     # How to end lines in a python script one-liner
     _SHELL_EMBEDDED_PY_EOL = '\\\n'
     _SHELL_REDIRECT_ALLNULL = '>& /dev/null'