diff --git a/querydsl-jpa/src/main/java/com/mysema/query/jpa/OpenJPATemplates.java b/querydsl-jpa/src/main/java/com/mysema/query/jpa/OpenJPATemplates.java
index a6f900f0a..5c29622ec 100644
--- a/querydsl-jpa/src/main/java/com/mysema/query/jpa/OpenJPATemplates.java
+++ b/querydsl-jpa/src/main/java/com/mysema/query/jpa/OpenJPATemplates.java
@@ -28,6 +28,7 @@ public class OpenJPATemplates extends JPQLTemplates{
     public OpenJPATemplates() {
         this(DEFAULT_ESCAPE);  
         add(Ops.ALIAS, "{0} {1}");
+        add(Ops.NEGATE, "-1 * {0}", 7);
     }
     
     public OpenJPATemplates(char escape) {
diff --git a/querydsl-jpa/src/test/java/com/mysema/query/AbstractStandardTest.java b/querydsl-jpa/src/test/java/com/mysema/query/AbstractStandardTest.java
index 75b57e639..ef0f87b18 100644
--- a/querydsl-jpa/src/test/java/com/mysema/query/AbstractStandardTest.java
+++ b/querydsl-jpa/src/test/java/com/mysema/query/AbstractStandardTest.java
@@ -763,6 +763,11 @@ public abstract class AbstractStandardTest {
         assertEquals(val, projection.val, 0.001); 
     }
     
+    @Test
+    public void Sum_4() {
+        query().from(cat).uniqueResult(cat.bodyWeight.sum().negate());
+    }
+    
     @Test
     public void Sum_as_Float() {
         float val = query().from(cat).uniqueResult(cat.floatProperty.sum());
diff --git a/querydsl-jpa/src/test/resources/META-INF/persistence.xml b/querydsl-jpa/src/test/resources/META-INF/persistence.xml
index 0d0ce16d0..1967243fd 100644
--- a/querydsl-jpa/src/test/resources/META-INF/persistence.xml
+++ b/querydsl-jpa/src/test/resources/META-INF/persistence.xml
@@ -144,7 +144,7 @@
 			<property name="javax.persistence.jdbc.driver" value="org.h2.Driver" />
 			<property name="javax.persistence.jdbc.url" value="jdbc:h2:target/h2-3" />
 			<property name="javax.persistence.jdbc.user" value="sa" />
-			<property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema(SchemaAction='dropDB',ForeignKeys=true)"/>
+			<property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema(ForeignKeys=true)"/>
 			<property name="openjpa.RuntimeUnenhancedClasses" value="supported" />
 			<property name="openjpa.jdbc.Schemas" value="PUBLIC"/>
 			<property name="openjpa.jdbc.DBDictionary" value="h2(useSchemaName=true)"/>