diff --git a/src/generators/server-side-rendering/index.ts b/src/generators/server-side-rendering/index.ts
index d355df7105..78441d4483 100644
--- a/src/generators/server-side-rendering/index.ts
+++ b/src/generators/server-side-rendering/index.ts
@@ -155,7 +155,13 @@ export default function ssr(
 			map: ${cssMap ? stringify(cssMap.toString()) : 'null'}
 		};
 
+		var warned = false;
 		${name}.renderCss = function() {
+			if (!warned) {
+				console.error('Component.renderCss(...) is deprecated and will be removed in v2 — use Component.render(...).css instead');
+				warned = true;
+			}
+
 			var components = [];
 
 			${generator.stylesheet.hasStyles &&
diff --git a/test/js/samples/ssr-no-oncreate-etc/expected-bundle.js b/test/js/samples/ssr-no-oncreate-etc/expected-bundle.js
index ed7a594825..cb02a0b01a 100644
--- a/test/js/samples/ssr-no-oncreate-etc/expected-bundle.js
+++ b/test/js/samples/ssr-no-oncreate-etc/expected-bundle.js
@@ -39,7 +39,13 @@ SvelteComponent.css = {
 	map: null
 };
 
+var warned = false;
 SvelteComponent.renderCss = function() {
+	if (!warned) {
+		console.error('Component.renderCss(...) is deprecated and will be removed in v2 — use Component.render(...).css instead');
+		warned = true;
+	}
+
 	var components = [];
 
 	return {
diff --git a/test/js/samples/ssr-no-oncreate-etc/expected.js b/test/js/samples/ssr-no-oncreate-etc/expected.js
index 10214240f9..101aef98da 100644
--- a/test/js/samples/ssr-no-oncreate-etc/expected.js
+++ b/test/js/samples/ssr-no-oncreate-etc/expected.js
@@ -41,7 +41,13 @@ SvelteComponent.css = {
 	map: null
 };
 
+var warned = false;
 SvelteComponent.renderCss = function() {
+	if (!warned) {
+		console.error('Component.renderCss(...) is deprecated and will be removed in v2 — use Component.render(...).css instead');
+		warned = true;
+	}
+
 	var components = [];
 
 	return {