diff --git a/src/interfaces/libpq/fe-connect.c b/src/interfaces/libpq/fe-connect.c
index d454538380..27a9805625 100644
--- a/src/interfaces/libpq/fe-connect.c
+++ b/src/interfaces/libpq/fe-connect.c
@@ -2795,6 +2795,8 @@ freePGconn(PGconn *conn)
 		free(conn->sslrootcert);
 	if (conn->sslcrl)
 		free(conn->sslcrl);
+	if (conn->sslcompression)
+		free(conn->sslcompression);
 	if (conn->requirepeer)
 		free(conn->requirepeer);
 #if defined(KRB5) || defined(ENABLE_GSS) || defined(ENABLE_SSPI)