diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractJavaCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractJavaCodegen.java
index 722586d930ff..57b32a87bf37 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractJavaCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractJavaCodegen.java
@@ -101,7 +101,7 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
                 "import", "public", "throws", "case", "enum", "instanceof", "return", "transient",
                 "catch", "extends", "int", "short", "try", "char", "final", "interface", "static",
                 "void", "class", "finally", "long", "strictfp", "volatile", "const", "float",
-                "native", "super", "while")
+                "native", "super", "while", "null")
         );
 
         languageSpecificPrimitives = new HashSet<String>(