diff --git a/desktop_version/CMakeLists.txt b/desktop_version/CMakeLists.txt
index 111272e2..a89b5dfd 100644
--- a/desktop_version/CMakeLists.txt
+++ b/desktop_version/CMakeLists.txt
@@ -337,3 +337,8 @@ if(HAIKU)
 	find_library(ROOT_LIBRARY root)
 	target_link_libraries(VVVVVV ${BE_LIBRARY} ${ROOT_LIBRARY})
 endif()
+if(EMSCRIPTEN)
+	target_compile_options(VVVVVV PUBLIC -sFORCE_FILESYSTEM=1)
+	# 256MB is enough for everybody
+	target_link_libraries(VVVVVV -sFORCE_FILESYSTEM=1 -sTOTAL_MEMORY=256MB)
+endif()