diff --git a/build.zig b/build.zig
index 8396b61..43a1732 100644
--- a/build.zig
+++ b/build.zig
@@ -59,6 +59,7 @@ pub fn build(b: *zbs.Builder) void {
     }, &.{
         "-W",
         "-Wno-unused-function",
+        "-fvisibility=hidden",
         //"-DDEBUG",
     });
     bdz.omit_frame_pointer = true;