diff --git a/src/Magnum/Platform/EmscriptenApplication.js b/src/Magnum/Platform/EmscriptenApplication.js
index fabf4c71d..3ac448da4 100644
--- a/src/Magnum/Platform/EmscriptenApplication.js
+++ b/src/Magnum/Platform/EmscriptenApplication.js
@@ -23,6 +23,8 @@
     DEALINGS IN THE SOFTWARE.
 */
 
+"use strict"; /* it summons the Cthulhu in a proper way, they say */
+
 var Module = {
     preRun: [],
     postRun: [],