diff --git a/www/common/common-util.js b/www/common/common-util.js
index 3d2a8d0a4..3419b5160 100644
--- a/www/common/common-util.js
+++ b/www/common/common-util.js
@@ -616,6 +616,10 @@
                      getColor().toString(16);
     };
 
+    Util.supportsWasm = function () {
+        return !(typeof(Atomics) === "undefined" || typeof (SharedArrayBuffer) === "undefined" || typeof(WebAssembly) === 'undefined');
+    };
+
     if (typeof(module) !== 'undefined' && module.exports) {
         module.exports = Util;
     } else if ((typeof(define) !== 'undefined' && define !== null) && (define.amd !== null)) {
diff --git a/www/common/onlyoffice/inner.js b/www/common/onlyoffice/inner.js
index 26c5aa947..9e31fa998 100644
--- a/www/common/onlyoffice/inner.js
+++ b/www/common/onlyoffice/inner.js
@@ -138,6 +138,10 @@ define([
 
         var startOO = function () {};
 
+        var supportsXLSX = function () {
+            return privateData.supportsWasm;
+        };
+
         var getMediasSources = APP.getMediasSources =  function() {
             content.mediasSources = content.mediasSources || {};
             return content.mediasSources;
diff --git a/www/common/sframe-common-outer.js b/www/common/sframe-common-outer.js
index ca60c2243..bc1f2f725 100644
--- a/www/common/sframe-common-outer.js
+++ b/www/common/sframe-common-outer.js
@@ -638,7 +638,8 @@ define([
                             title: Cryptpad.fromFileData.title
                         } : undefined,
                         burnAfterReading: burnAfterReading,
-                        storeInTeam: Cryptpad.initialTeam || (Cryptpad.initialPath ? -1 : undefined)
+                        storeInTeam: Cryptpad.initialTeam || (Cryptpad.initialPath ? -1 : undefined),
+                        supportsWasm: Utils.Util.supportsWasm()
                     };
                     if (window.CryptPad_newSharedFolder) {
                         additionalPriv.newSharedFolder = window.CryptPad_newSharedFolder;