diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 18a02ab972..f4e9a21cdc 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -124,6 +124,7 @@ Fixed
   Contributed by Hiroyasu OHYAMA (@userlocalhost).
 * Fix a bug with user-scoped datastore values not working inside action-chain workflows. (bug fix)
   #4634
+* Added missing parameter types to ``linux.wait_for_ssh`` action metadata. (bug fix) #4611
 
 2.10.4 - March 15, 2019
 -----------------------
diff --git a/contrib/linux/actions/wait_for_ssh.yaml b/contrib/linux/actions/wait_for_ssh.yaml
index a1024c9212..2af7719637 100644
--- a/contrib/linux/actions/wait_for_ssh.yaml
+++ b/contrib/linux/actions/wait_for_ssh.yaml
@@ -16,13 +16,16 @@
       default: 22
     username:
       description: "Username used to authenticate."
+      type: "string"
       required: true
       default: "stanley"
     password:
       description: "Password used to authenticate."
+      type: "string"
       required: false
     keyfile:
       description: "SSH key file used to authenticate."
+      type: "string"
       required: false
     ssh_timeout:
       description: "SSH connection connect timeout (in seconds)."
@@ -40,3 +43,4 @@
       # Note: timeout needs to be >= ((ssh_timeout + sleep_delay) * retries) so we override a
       # default Python runner action timeout with a larger value
       default: 400
+      type: "integer"