diff --git a/substrate/primitives/runtime/Cargo.toml b/substrate/primitives/runtime/Cargo.toml
index 030c44c284..278962bcf5 100644
--- a/substrate/primitives/runtime/Cargo.toml
+++ b/substrate/primitives/runtime/Cargo.toml
@@ -58,4 +58,5 @@ std = [
 	"sp-core/std",
 	"sp-io/std",
 	"sp-std/std",
+	"sp-weights/std",
 ]