diff --git a/build/toolchain.emscripten.mak b/build/toolchain.emscripten.mak
index fb81cc14b..3de4f7ea6 100644
--- a/build/toolchain.emscripten.mak
+++ b/build/toolchain.emscripten.mak
@@ -5,6 +5,7 @@ LD = emcc
 EMSCRIPTEN_ASYNC_SYMBOLS = \
 SAFE_HEAP_LOAD \
 SAFE_HEAP_STORE \
+_IonDisplayForceRefresh\
 _IonEventsEmscriptenKeyDown \
 _IonEventsEmscriptenKeyUp \
 _IonEventsEmscriptenPushEvent \
@@ -121,4 +122,4 @@ EMSCRIPTEN_INIT_FILE ?= 0
 LDFLAGS += --memory-init-file $(EMSCRIPTEN_INIT_FILE)
 
 SFLAGS += $(EMFLAGS)
-LDFLAGS += $(EMFLAGS) -Oz -s EXPORTED_FUNCTIONS='["_main", "_IonSimulatorKeyboardKeyDown", "_IonSimulatorKeyboardKeyUp", "_IonSimulatorEventsPushEvent", "_IonSoftwareVersion", "_IonPatchLevel"]' -s EXTRA_EXPORTED_RUNTIME_METHODS='["UTF8ToString"]'
+LDFLAGS += $(EMFLAGS) -Oz -s EXPORTED_FUNCTIONS='["_main", "_IonSimulatorKeyboardKeyDown", "_IonSimulatorKeyboardKeyUp", "_IonSimulatorEventsPushEvent", "_IonSoftwareVersion", "_IonPatchLevel", "_IonDisplayForceRefresh"]' -s EXTRA_EXPORTED_RUNTIME_METHODS='["UTF8ToString"]'
diff --git a/ion/src/simulator/web/helpers.cpp b/ion/src/simulator/web/helpers.cpp
index 35c7ce2fc..b3ced2b17 100644
--- a/ion/src/simulator/web/helpers.cpp
+++ b/ion/src/simulator/web/helpers.cpp
@@ -1,4 +1,5 @@
 #include <ion.h>
+#include "../shared/main.h"
 
 extern "C" const char * IonSoftwareVersion() {
   return Ion::softwareVersion();
@@ -7,3 +8,8 @@ extern "C" const char * IonSoftwareVersion() {
 extern "C" const char * IonPatchLevel() {
   return Ion::patchLevel();
 }
+
+extern "C" void IonDisplayForceRefresh() {
+  Ion::Simulator::Main::setNeedsRefresh();
+  Ion::Simulator::Main::refresh();
+}
diff --git a/ion/src/simulator/web/simulator.html b/ion/src/simulator/web/simulator.html
index d96722176..a51f745cd 100644
--- a/ion/src/simulator/web/simulator.html
+++ b/ion/src/simulator/web/simulator.html
@@ -261,6 +261,9 @@ Epsilon(Module);
     </script>
     <script>
 function screenshot() {
+  <!--toDataURL needs the canvas to be refreshed-->
+  Module._IonDisplayForceRefresh();
+
   var canvas = document.querySelector('.screen');
   var link = document.createElement('a');
   link.download = 'screenshot.png';