diff --git a/java_gen/templates/of_class.java b/java_gen/templates/of_class.java
index aa68d04..00c7019 100644
--- a/java_gen/templates/of_class.java
+++ b/java_gen/templates/of_class.java
@@ -354,6 +354,8 @@
         //:: for prop in msg.data_members:
         //:: if prop.java_type.pub_type == 'long':
         result = prime *  (int) (${prop.name} ^ (${prop.name} >>> 32));
+        //:: elif prop.java_type.pub_type == 'boolean':
+        result = prime * result + (${prop.name} ? 1231 : 1237);
         //:: elif prop.java_type.is_primitive:
         result = prime * result + ${prop.name};
         //:: elif prop.java_type.is_array: