1 files changed, 5 insertions, 0 deletions
diff --git a/Cargo.toml b/Cargo.toml
index d846862..401d553 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,6 +15,11 @@ travis-ci = { repository = "vhdirk/notmuch-rs" }
 libc = "0.2"
 clippy = { version = "0.0.193", optional = true }
 
+[features]
+v0_21 = []
+v0_26 = ["v0_21"]
+default = ["v0_26"]
+
 
 [[test]]
 name = "main"