diff --git a/Tupfile.lua b/Tupfile.lua
index d19f2f95..446009cc 100644
--- a/Tupfile.lua
+++ b/Tupfile.lua
@@ -453,7 +453,7 @@ comp = 'etc/shaders/*.comp'
 
 function compileShaders(stage)
   pattern = 'etc/shaders/*.' .. stage
-  tup.foreach_rule(pattern, 'glslangValidator --quiet -Os --target-env vulkan1.1 --vn lovr_shader_%B_' .. stage .. ' -o %o %f', '%f.h')
+  tup.foreach_rule(pattern, 'glslangValidator --quiet --target-env vulkan1.1 --vn lovr_shader_%B_' .. stage .. ' -o %o %f', '%f.h')
 end
 
 compileShaders('vert')