diff --git a/pc-bios/meson.build b/pc-bios/meson.build
index 79bb2e1800..3c41620044 100644
--- a/pc-bios/meson.build
+++ b/pc-bios/meson.build
@@ -88,7 +88,7 @@ blobs = [
 ]
 
 if get_option('install_blobs')
-  install_data(blobs, install_dir: qemu_datadir)
+  install_data(blobs, install_dir: qemu_datadir, install_mode: 'rw-r--r--')
 endif
 
 subdir('descriptors')