diff --git a/ports/webassembly/Makefile b/ports/webassembly/Makefile
index 450ef8768077..c5ee80fe0046 100644
--- a/ports/webassembly/Makefile
+++ b/ports/webassembly/Makefile
@@ -38,7 +38,6 @@ OBJ += $(addprefix $(BUILD)/, $(SRC_C:.c=.o))
 JSFLAGS += -s ASYNCIFY
 JSFLAGS += -s EXPORTED_FUNCTIONS="['_mp_js_init', '_mp_js_init_repl', '_mp_js_do_str', '_mp_js_process_char', '_mp_hal_get_interrupt_char', '_mp_sched_keyboard_interrupt']"
 JSFLAGS += -s EXPORTED_RUNTIME_METHODS="['ccall', 'cwrap', 'FS']"
-JSFLAGS += -s --memory-init-file 0
 JSFLAGS += --js-library library.js
 
 all: $(BUILD)/micropython.js