diff --git a/sqlx-core/Cargo.toml b/sqlx-core/Cargo.toml
index cc4459a8..622026dc 100644
--- a/sqlx-core/Cargo.toml
+++ b/sqlx-core/Cargo.toml
@@ -15,7 +15,7 @@ authors = [
 [features]
 default = [ "runtime-async-std" ]
 unstable = []
-postgres = [ "md-5", "sha2", "base64", "sha-1", "rand", "hmac" ]
+postgres = [ "md-5", "sha2", "base64", "sha-1", "rand", "hmac", "futures-channel/sink", "futures-util/sink" ]
 mysql = [ "sha-1", "sha2", "generic-array", "num-bigint", "base64", "digest", "rand" ]
 sqlite = [ "libsqlite3-sys" ]
 tls = [ "async-native-tls" ]