diff --git a/proxy/src/cplane_api.rs b/proxy/src/cplane_api.rs
index 29550a488f..51a8c96b71 100644
--- a/proxy/src/cplane_api.rs
+++ b/proxy/src/cplane_api.rs
@@ -36,12 +36,14 @@ impl CPlaneApi {
     pub fn authenticate_proxy_request(
         &self,
         user: &str,
+        database: &str,
         md5_response: &[u8],
         salt: &[u8; 4],
     ) -> Result<DatabaseInfo> {
         let mut url = reqwest::Url::parse(self.auth_endpoint)?;
         url.query_pairs_mut()
             .append_pair("login", user)
+            .append_pair("database", database)
             .append_pair("md5response", std::str::from_utf8(md5_response)?)
             .append_pair("salt", &hex::encode(salt));
 
diff --git a/proxy/src/proxy.rs b/proxy/src/proxy.rs
index a82fb0f5e4..5755a9cf9f 100644
--- a/proxy/src/proxy.rs
+++ b/proxy/src/proxy.rs
@@ -176,6 +176,7 @@ impl ProxyConnection {
 
             match self.cplane.authenticate_proxy_request(
                 self.user.as_str(),
+                self.database.as_str(),
                 md5_response,
                 &self.md5_salt,
             ) {