diff --git a/src/main/java/io/github/divinespear/maven/plugin/JpaSchemaGeneratorMojo.java b/src/main/java/io/github/divinespear/maven/plugin/JpaSchemaGeneratorMojo.java
index ae2edc4..c87b430 100644
--- a/src/main/java/io/github/divinespear/maven/plugin/JpaSchemaGeneratorMojo.java
+++ b/src/main/java/io/github/divinespear/maven/plugin/JpaSchemaGeneratorMojo.java
@@ -508,7 +508,7 @@ private ClassLoader getProjectClassLoader() throws MojoExecutionException {
 
     private void generate() throws Exception {
         Map<String, Object> map = JpaSchemaGeneratorUtils.buildProperties(this);
-        if (getVendor() == null) {
+        if (getVendor() != null) {
             // with persistence.xml
             Persistence.generateSchema(this.persistenceUnitName, map);
         } else {