diff --git a/addStyles.js b/addStyles.js
index c81451da..7b36f260 100644
--- a/addStyles.js
+++ b/addStyles.js
@@ -171,12 +171,17 @@ function attachTagAttrs(element, attrs) {
 function addStyle(obj, options) {
 	var styleElement, update, remove;
 
+	if (obj.sourceMap && typeof options.sourceRoot === "string") {
+		obj.sourceMap.sourceRoot = options.sourceRoot;
+	}
+
 	if (options.singleton) {
 		var styleIndex = singletonCounter++;
 		styleElement = singletonElement || (singletonElement = createStyleElement(options));
 		update = applyToSingletonTag.bind(null, styleElement, styleIndex, false);
 		remove = applyToSingletonTag.bind(null, styleElement, styleIndex, true);
 	} else if(obj.sourceMap &&
+		options.sourceMap !== false &&
 		typeof URL === "function" &&
 		typeof URL.createObjectURL === "function" &&
 		typeof URL.revokeObjectURL === "function" &&