diff --git a/glib/Cargo.toml b/glib/Cargo.toml
index 6ca08d8c6e9d..de8c41b7415b 100644
--- a/glib/Cargo.toml
+++ b/glib/Cargo.toml
@@ -31,7 +31,7 @@ ffi = { package = "glib-sys", path = "sys" }
 gobject_ffi = { package = "gobject-sys", path = "gobject-sys" }
 glib-macros = { path = "../glib-macros" }
 rs-log = { package = "log", version = "0.4", optional = true }
-smallvec = "1.0"
+smallvec = { version = "1.0", features = ["union", "const_generics", "const_new"] }
 thiserror = "1"
 gio_ffi = { package = "gio-sys", path = "../gio/sys", optional = true }
 memchr = "2.5.0"