diff --git a/wasm_cross.txt b/wasm_cross.txt
index 7606f270..7930335a 100644
--- a/wasm_cross.txt
+++ b/wasm_cross.txt
@@ -11,8 +11,8 @@ shared_module_suffix = 'js'
 exe_suffix = 'js'
 
 #[built-in options]
-cpp_args = ['-Wshift-negative-value', '--bind' , '-s' , 'WASM=1' , '-s' , 'ALLOW_MEMORY_GROWTH=1' , '-s' , 'FORCE_FILESYSTEM=1' , '-O2']
-cpp_link_args = ['-Wshift-negative-value', '--bind' , '-s' , 'WASM=1' , '-s' , 'ALLOW_MEMORY_GROWTH=1' , '-s' , 'FORCE_FILESYSTEM=1' , '-O2']
+cpp_args = ['-Wshift-negative-value', '--bind' , '-s' , 'WASM=1' , '-s' , 'ALLOW_MEMORY_GROWTH=1' , '-s' , 'FORCE_FILESYSTEM=1' , '-flto', '-O2']
+cpp_link_args = ['-Wshift-negative-value', '--bind' , '-s' , 'WASM=1' , '-s' , 'ALLOW_MEMORY_GROWTH=1' , '-s' , 'FORCE_FILESYSTEM=1' , '-flto', '-O2']
 
 [host_machine]
 system = 'emscripten'