diff --git a/substrate/srml/babe/Cargo.toml b/substrate/srml/babe/Cargo.toml
index d961b724ff..4b82a6c6bc 100644
--- a/substrate/srml/babe/Cargo.toml
+++ b/substrate/srml/babe/Cargo.toml
@@ -35,4 +35,5 @@ std = [
 	"timestamp/std",
 	"inherents/std",
 	"babe-primitives/std",
+	"session/std",
 ]