diff --git a/fixture.js b/fixture.js
index e7b2733..0a2704a 100644
--- a/fixture.js
+++ b/fixture.js
@@ -4,6 +4,7 @@ var fixture = core.add;
 var Store = require("./store");
 require("./xhr");
 var canReflect = require("can-reflect");
+var canDev = require("can-log/dev/dev");
 var ns = require("can-namespace");
 // HELPERS START
 
@@ -67,7 +68,12 @@ canReflect.assignMap(fixture, {
 });
 
 if(typeof window !== "undefined" && typeof require.resolve !== "function") {
-	window.fixture = fixture;
+
+	window.fixture = function(){
+		canDev.warn("You are using the global fixture. Make sure you import can-fixture.");
+
+		return fixture.apply(this, arguments);
+	};	
 }
 
 
diff --git a/test/fixture_test.js b/test/fixture_test.js
index e177bd7..ba99edf 100644
--- a/test/fixture_test.js
+++ b/test/fixture_test.js
@@ -1974,6 +1974,20 @@ if ("onabort" in XMLHttpRequest._XHR.prototype) {
 		xhr.send();
 	});
 
+	testHelpers.dev.devOnlyTest("window.fixture warns when called", function() {
+		var teardown = testHelpers.dev.willWarn(/You are using the global fixture\. Make sure you import can-fixture\./, function(message, matched) {
+			if(matched) {
+				ok(true, "received warning");
+			}
+		});
+
+		window.fixture("GET /api/products", function(){
+			return {};
+		});
+
+		teardown();	
+	});
+
 	testHelpers.dev.devOnlyTest("Works with steal-clone", function() {
 		steal.loader.import("steal-clone", { name: "can-fixture" })
 		.then(function(clone) {
@@ -1996,3 +2010,6 @@ if ("onabort" in XMLHttpRequest._XHR.prototype) {
 		stop();
 	});
 } // END onabort check
+
+
+