diff --git a/docs/References/Window.md b/docs/References/Window.md
index 4ad21b9e65..ffa1fdf1bb 100644
--- a/docs/References/Window.md
+++ b/docs/References/Window.md
@@ -296,6 +296,9 @@ Turn the window's native shadow on/off. Useful for frameless, transparent window
 !!! warning "Behavior Changed"
     The behavior of the function is changed since 0.13.0. Please see [Migration Notes from 0.12 to 0.13](../For Users/Migration/From 0.12 to 0.13.md).
 
+!!! note
+    Since 0.75, the function throws an error if the build flavor is not SDK. This error can be caught in a try catch block.
+
 * `iframe` `{String} or {HTMLIFrameElement}` _Optional_ the id or the element of the `<iframe>` to be jailed on. By default, the DevTools is shown for entire window.
 * `callback(dev_win)` `{Function}` callback with the native window of the DevTools window.
 
diff --git a/src/resources/api_nw_newwin.js b/src/resources/api_nw_newwin.js
index 962614d722..799aa11650 100644
--- a/src/resources/api_nw_newwin.js
+++ b/src/resources/api_nw_newwin.js
@@ -369,15 +369,23 @@ NWWindow.prototype.toggleKioskMode = function() {
   currentNWWindowInternal.toggleKioskModeInternal(this.cWindow.id);
 };
 
-NWWindow.prototype.showDevTools = function(frm, callback) {
-  var id = '';
-  if (typeof frm === 'string')
-    id = frm;
-  var f = null;
+/**
+ * Open the devtools to inspect the new window.
+ * 
+ * @param {string | HTMLIFrameElement} iframe
+ * @param {Function} callback
+ */
+NWWindow.prototype.showDevTools = function(iframe, callback) {
+  if (process.versions['nw-flavor'] !== 'sdk')
+    throw new Error('showDevTools does not exist on normal build flavor.');
+  let id = '';
+  if (typeof iframe === 'string')
+    id = iframe;
+  let f = null;
   if (id)
     f = this.window.getElementById(id);
   else
-    f = frm || null;
+    f = iframe || null;
   nwNatives.setDevToolsJail(f);
   currentNWWindowInternal.showDevTools2Internal(this.cWindow.id, callback);
 };
diff --git a/src/resources/api_nw_window.js b/src/resources/api_nw_window.js
index 7e50dadc26..d3ff6396a4 100644
--- a/src/resources/api_nw_window.js
+++ b/src/resources/api_nw_window.js
@@ -371,15 +371,23 @@ apiBridge.registerCustomHook(function(bindingsAPI) {
       currentNWWindowInternal.toggleKioskModeInternal();
     };
 
-    NWWindow.prototype.showDevTools = function(frm, callback) {
-      var id = '';
-      if (typeof frm === 'string')
-        id = frm;
-      var f = null;
+    /**
+    * Open the devtools to inspect the current window.
+    * 
+    * @param {string | HTMLIFrameElement} iframe
+    * @param {Function} callback
+    */
+    NWWindow.prototype.showDevTools = function(iframe, callback) {
+      if (process.versions['nw-flavor'] !== 'sdk')
+        throw new Error('showDevTools does not exist on normal build flavor.');
+      let id = '';
+      if (typeof iframe === 'string')
+        id = iframe;
+      let f = null;
       if (id)
         f = this.appWindow.contentWindow.getElementById(id);
       else
-        f = frm || null;
+        f = iframe || null;
       nwNatives.setDevToolsJail(f);
       currentNWWindowInternal.showDevToolsInternal(callback);
     };
diff --git a/test/manual/window-showdevtools/index.html b/test/manual/window-showdevtools/index.html
new file mode 100644
index 0000000000..a1d0b791fd
--- /dev/null
+++ b/test/manual/window-showdevtools/index.html
@@ -0,0 +1,27 @@
+<html>
+
+<head>
+    <script>
+        document.addEventListener("DOMContentLoaded", () => {
+            const process = require("process");
+            const w = nw.Window.get();
+            document.getElementById("flavor").innerText = "Flavor: " + process.versions["nw-flavor"];
+            try {
+                w.showDevTools();
+            } catch (error) {
+                document.getElementById("result").innerText = error;
+            }
+
+        });
+    </script>
+</head>
+
+<body>
+    <span>The showDevTools function is executted on DOMContentLoaded. If flavor is normal and nw does not crash (assuming error is caught in a try/catch block), test is succesful.</span>
+    <br>
+    <span id="flavor"></span>
+    <br>
+    <span id="result"></span>
+</body>
+
+</html>
diff --git a/test/manual/window-showdevtools/package.json b/test/manual/window-showdevtools/package.json
new file mode 100644
index 0000000000..2330e6d2f3
--- /dev/null
+++ b/test/manual/window-showdevtools/package.json
@@ -0,0 +1,4 @@
+{
+    "name": "window-showdevtools",
+    "main": "index.html"
+}
