diff --git a/scripts/travis-emscripten/build_emscripten.sh b/scripts/travis-emscripten/build_emscripten.sh
index 8011205db..c2c8760ef 100755
--- a/scripts/travis-emscripten/build_emscripten.sh
+++ b/scripts/travis-emscripten/build_emscripten.sh
@@ -94,6 +94,9 @@ make -j 4
 
 cd ..
 mkdir -p upload
+# Patch soljson.js to provide backwards-compatibility with older emscripten versions
+# TODO: remove in 0.6.0!
+echo -n ";/* backwards compatibility */ Module['Runtime'] = Module; Module['Pointer_stringify'] = Module['UTF8ToString'];" >> $BUILD_DIR/libsolc/soljson.js
 cp $BUILD_DIR/libsolc/soljson.js upload/
 cp $BUILD_DIR/libsolc/soljson.js ./