diff --git a/.github/ISSUE_TEMPLATE/BUG_REPORT.md b/.github/ISSUE_TEMPLATE/BUG_REPORT.md
index 19849a8a..63d48297 100644
--- a/.github/ISSUE_TEMPLATE/BUG_REPORT.md
+++ b/.github/ISSUE_TEMPLATE/BUG_REPORT.md
@@ -8,16 +8,21 @@ labels:
 <!-- Please check the Q&A before posting an issue: https://github.com/JamesIves/github-pages-deploy-action/discussions?discussions_q=category%3AQ%26A -->
 
 ## Describe the bug
+
 <!-- Please provide a clear and concise description of what the bug is. -->
 
 ## Reproduction Steps
+
 <!-- Steps to reproduce the behavior. -->
 
 ## Logs
+
 <!-- Please provide your deployment logs. If the error message isn't revealing the problem please set ACTIONS_STEP_DEBUG to true in your repository's secrets menu and run the workflow again. -->
 
 ## Workflow
+
 <!-- Please provide a link or snippet of your workflow yml file. -->
 
 ## Additional Comments
+
 <!--Add any other context about the problem here. -->
diff --git a/src/constants.ts b/src/constants.ts
index a2f682af..2aacbc1b 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -148,3 +148,12 @@ export enum Status {
   SKIPPED = 'skipped',
   RUNNING = 'running'
 }
+
+/* Platform codes. */
+export enum OperatingSystems {
+  LINUX = 'Linux',
+  WINDOWS = 'Windows',
+  MACOS = 'macOS'
+}
+
+export const SupportedOperatingSystems = [OperatingSystems.LINUX]
diff --git a/src/util.ts b/src/util.ts
index 927fea61..ae44704d 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -1,7 +1,12 @@
-import {isDebug} from '@actions/core'
+import {isDebug, info} from '@actions/core'
 import {existsSync} from 'fs'
 import path from 'path'
-import {ActionInterface, RequiredActionParameters} from './constants'
+import {
+  ActionInterface,
+  OperatingSystems,
+  RequiredActionParameters,
+  SupportedOperatingSystems
+} from './constants'
 
 /* Replaces all instances of a match in a string. */
 const replaceAll = (input: string, find: string, replace: string): string =>
@@ -66,6 +71,16 @@ export const checkParameters = (action: ActionInterface): void => {
       `The directory you're trying to deploy named ${action.folderPath} doesn't exist. Please double check the path and any prerequisite build scripts and try again. ❗`
     )
   }
+
+  if (
+    SupportedOperatingSystems.includes(
+      process.env.RUNNER_OS as OperatingSystems
+    )
+  ) {
+    info(
+      `The operating system you're using is not supported and results may be varied. Please refer to the documentation for more details. ❗`
+    )
+  }
 }
 
 /* Suppresses sensitive information from being exposed in error messages. */