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-rw-r--r--lib/sourcemap.js2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/sourcemap.js b/lib/sourcemap.js
index da4ab4fe..a9dc6a81 100644
--- a/lib/sourcemap.js
+++ b/lib/sourcemap.js
@@ -41,6 +41,8 @@
***********************************************************************/
+"use strict";
+
// a small wrapper around fitzgen's source-map library
function SourceMap(options) {
options = defaults(options, {