diff --git a/emscripten/ball.mk b/emscripten/ball.mk
index ee64a9fd..1114354d 100644
--- a/emscripten/ball.mk
+++ b/emscripten/ball.mk
@@ -33,7 +33,7 @@ EM_LDFLAGS := \
 	-s INVOKE_RUN=0 \
 	-s NO_EXIT_RUNTIME=1 \
 	-s EXPORTED_FUNCTIONS=_main,_push_user_event,_config_set \
-	-s EXPORTED_RUNTIME_METHODS=callMain,ccall,cwrap,FS,IDBFS,pauseMainLoop,resumeMainLoop \
+	-s EXPORTED_RUNTIME_METHODS=HEAP8,callMain,ccall,cwrap,FS,IDBFS,pauseMainLoop,resumeMainLoop \
 	-s HTML5_SUPPORT_DEFERRING_USER_SENSITIVE_REQUESTS=0 \
 	-s LLD_REPORT_UNDEFINED \
 	-s FETCH=1 \