diff --git a/src/bin/scripts/pg_isready.c b/src/bin/scripts/pg_isready.c
index d27ccea..7568df5 100644
--- a/src/bin/scripts/pg_isready.c
+++ b/src/bin/scripts/pg_isready.c
@@ -130,7 +130,7 @@ main(int argc, char **argv)
 	/*
 	 * Get the host and port so we can display them in our output
 	 */
-	if (pgdbname)
+	if (pgdbname && strchr(pgdbname, '=') != NULL)
 	{
 		opts = PQconninfoParse(pgdbname, &errmsg);
 		if (opts == NULL)