diff --git a/tools/jcw-gen/App.cs b/tools/jcw-gen/App.cs
index 94f5fd4da..b8d21bfe1 100644
--- a/tools/jcw-gen/App.cs
+++ b/tools/jcw-gen/App.cs
@@ -83,6 +83,10 @@ public static int Main (string [] args)
 
 		static void GenerateJavaCallableWrapper (TypeDefinition type, string outputPath, TypeDefinitionCache cache)
 		{
+			if (type.IsInterface) {
+				return;
+			}
+
 			var generator = new JavaCallableWrapperGenerator (type, log: Console.WriteLine, cache) {
 			};
 			generator.Generate (outputPath);