diff --git a/app/src/processing/app/contrib/ModeContribution.java b/app/src/processing/app/contrib/ModeContribution.java
index a7db4a2bd..26a13a2de 100644
--- a/app/src/processing/app/contrib/ModeContribution.java
+++ b/app/src/processing/app/contrib/ModeContribution.java
@@ -92,8 +92,9 @@ public class ModeContribution extends InstalledContribution {
       loader = new URLClassLoader(urlList);
   
       for (int j = 0; j < archives.length; j++) {
-        className = ToolContribution.findClassInZipFile(folder.getName(),
-                                                        archives[j]);
+        className = ToolContribution.findClassInZipFile( folder.getName(),
+                                                         archives[j] );
+		if (className != null) break;
       }
     } catch (MalformedURLException e) {
       // Maybe log this