diff --git a/bin/wait-for-mysql b/bin/wait-for-mysql
index 062ed2a..0c9cf2c 100755
--- a/bin/wait-for-mysql
+++ b/bin/wait-for-mysql
@@ -1,4 +1,5 @@
 #!/bin/bash
+MYSQL_PORT=${MYSQL_PORT:-3306}
 echo -n "Waiting for MySQL..."
 while ! mysqladmin ping -h"$MYSQL_HOST" -P"$MYSQL_PORT" --silent; do
     sleep 1