diff --git a/share/apps.json b/share/apps.json
index 8f9fd7d3c..16c75f579 100644
--- a/share/apps.json
+++ b/share/apps.json
@@ -1683,7 +1683,8 @@
 		"Mambo": {
 			"website": "mambo-foundation.org",
 			"cats": [ 1 ],
-			"meta": { "generator": "Mambo" }
+			"meta": { "generator": "Mambo" },
+			"excludes": "Joomla"
 		},
 		"MantisBT": {
 			"website": "www.mantisbt.org",