diff --git a/addStyles.js b/addStyles.js
index ef4fd5fd..8168dfa0 100644
--- a/addStyles.js
+++ b/addStyles.js
@@ -232,7 +232,9 @@ function updateLink(linkElement, obj) {
 
 	if(sourceMap) {
 		// http://stackoverflow.com/a/26603875
-		css += "\n/*# sourceMappingURL=data:application/json;base64," + btoa(unescape(encodeURIComponent(JSON.stringify(sourceMap)))) + " */";
+		// The seemingly-unnecessary break between 'source' and 'Mapping' is to prevent Chrome 51 (at least) from
+		// trying to interpret this code as an actual source map reference.
+		css += "\n/*# source" + "MappingURL=data:application/json;base64," + btoa(unescape(encodeURIComponent(JSON.stringify(sourceMap)))) + " */";
 	}
 
 	var blob = new Blob([css], { type: "text/css" });