diff --git a/phpBB/styles/prosilver/template/overall_footer.html b/phpBB/styles/prosilver/template/overall_footer.html
index 348d1736e0..3db3087dc0 100644
--- a/phpBB/styles/prosilver/template/overall_footer.html
+++ b/phpBB/styles/prosilver/template/overall_footer.html
@@ -70,24 +70,27 @@
 <!-- IF S_COOKIE_NOTICE -->
 	<script src="{T_ASSETS_PATH}/cookieconsent/cookieconsent.min.js?assets_version={T_ASSETS_VERSION}"></script>
 	<script>
-		window.addEventListener("load", function(){
-			window.cookieconsent.initialise({
-				"palette": {
-					"popup": {
-						"background": "#0F538A"
+		if (typeof window.cookieconsent === "object") {
+			window.addEventListener("load", function(){
+				window.cookieconsent.initialise({
+					"palette": {
+						"popup": {
+							"background": "#0F538A"
+						},
+						"button": {
+							"background": "#E5E5E5"
+						}
 					},
-					"button": {
-						"background": "#E5E5E5"
+					"theme": "classic",
+					"content": {
+						"message": "{LA_COOKIE_CONSENT_MSG}",
+						"dismiss": "{LA_COOKIE_CONSENT_OK}",
+						"link": "{LA_COOKIE_CONSENT_INFO}",
+						"href": "{LA_COOKIE_CONSENT_HREF}"
 					}
-				},
-				"theme": "classic",
-				"content": {
-					"message": "{LA_COOKIE_CONSENT_MSG}",
-					"dismiss": "{LA_COOKIE_CONSENT_OK}",
-					"link": "{LA_COOKIE_CONSENT_INFO}",
-					"href": "{LA_COOKIE_CONSENT_HREF}"
-				}
-			})});
+				});
+			});
+		}
 	</script>
 <!-- ENDIF -->