diff --git a/querydsl-collections/src/main/java/com/mysema/query/collections/ColQueryMixin.java b/querydsl-collections/src/main/java/com/mysema/query/collections/ColQueryMixin.java
index 4bc761bef..03e80ccef 100644
--- a/querydsl-collections/src/main/java/com/mysema/query/collections/ColQueryMixin.java
+++ b/querydsl-collections/src/main/java/com/mysema/query/collections/ColQueryMixin.java
@@ -37,7 +37,9 @@ public class ColQueryMixin<T> extends QueryMixin<T> {
     @Override
     protected Predicate[] normalize(Predicate[] conditions, boolean where) {
         for (int i = 0; i < conditions.length; i++){
-            conditions[i] = normalize(conditions[i], where);
+            if (conditions[i] != null) {
+                conditions[i] = normalize(conditions[i], where);    
+            }            
         }
         return conditions;
     }
diff --git a/querydsl-jdo/src/main/java/com/mysema/query/jdo/JDOQLQueryMixin.java b/querydsl-jdo/src/main/java/com/mysema/query/jdo/JDOQLQueryMixin.java
index b9e040c70..37639b156 100644
--- a/querydsl-jdo/src/main/java/com/mysema/query/jdo/JDOQLQueryMixin.java
+++ b/querydsl-jdo/src/main/java/com/mysema/query/jdo/JDOQLQueryMixin.java
@@ -43,7 +43,9 @@ public class JDOQLQueryMixin<T> extends QueryMixin<T> {
     @Override
     protected Predicate[] normalize(Predicate[] conditions, boolean where) {
         for (int i = 0; i < conditions.length; i++){
-            conditions[i] = normalize(conditions[i], where);
+            if (conditions[i] != null) {
+                conditions[i] = normalize(conditions[i], where);    
+            }   
         }
         return conditions;
     }
diff --git a/querydsl-jpa/src/main/java/com/mysema/query/jpa/JPQLQueryMixin.java b/querydsl-jpa/src/main/java/com/mysema/query/jpa/JPQLQueryMixin.java
index 99d56014d..d58972b0c 100644
--- a/querydsl-jpa/src/main/java/com/mysema/query/jpa/JPQLQueryMixin.java
+++ b/querydsl-jpa/src/main/java/com/mysema/query/jpa/JPQLQueryMixin.java
@@ -71,7 +71,9 @@ public class JPQLQueryMixin<T> extends QueryMixin<T> {
     @Override
     protected Predicate[] normalize(Predicate[] conditions, boolean where) {
         for (int i = 0; i < conditions.length; i++){
-            conditions[i] = normalize(conditions[i], where);
+            if (conditions[i] != null) {
+                conditions[i] = normalize(conditions[i], where);    
+            }   
         }
         return conditions;
     }