diff --git a/tasks/task_save.c b/tasks/task_save.c
index 859f1629c7ff..fd4b19750781 100644
--- a/tasks/task_save.c
+++ b/tasks/task_save.c
@@ -62,7 +62,11 @@
 #include "../cheat_manager.h"
 #endif
 
-#if defined(HAVE_LIBNX) || defined(_3DS)
+#ifdef EMSCRIPTEN
+/* Filesystem is in-memory anyway, use huge chunks since each
+   read/write is a possible suspend to JS code */
+#define SAVE_STATE_CHUNK 4096 * 4096
+#elif defined(HAVE_LIBNX) || defined(_3DS)
 #define SAVE_STATE_CHUNK 4096 * 10
 #else
 #define SAVE_STATE_CHUNK 4096