diff --git a/querydsl-core/src/main/java/com/mysema/query/util/Assert.java b/querydsl-core/src/main/java/com/mysema/query/util/Assert.java
index 125dbd6c1..6edfc2ec1 100644
--- a/querydsl-core/src/main/java/com/mysema/query/util/Assert.java
+++ b/querydsl-core/src/main/java/com/mysema/query/util/Assert.java
@@ -23,4 +23,8 @@ public class Assert {
         return object;
     }
 
+    public static String notEmpty(String contentType) {
+        return hasText(contentType);
+    }
+
 }