diff --git a/src/add-ons/disk_systems/bfs/Jamfile b/src/add-ons/disk_systems/bfs/Jamfile
index 896f31b2c0..6c42beb282 100644
--- a/src/add-ons/disk_systems/bfs/Jamfile
+++ b/src/add-ons/disk_systems/bfs/Jamfile
@@ -17,7 +17,7 @@ Addon <disk_system>bfs :
 ;
 
 DoCatalogs <disk_system>bfs :
-	application/x-vnd.Haiku-BFSAddOn
+	x-vnd.Haiku-BFSAddOn
 	:
 	InitializeParameterEditor.cpp	
 ;
diff --git a/src/add-ons/disk_systems/intel/Jamfile b/src/add-ons/disk_systems/intel/Jamfile
index 0c20ee7c2f..fac4f5d0db 100644
--- a/src/add-ons/disk_systems/intel/Jamfile
+++ b/src/add-ons/disk_systems/intel/Jamfile
@@ -27,7 +27,7 @@ Addon <disk_system>intel :
 ;
 
 DoCatalogs <disk_system>intel :
-	application/x-vnd.Haiku-IntelDiskAddOn
+	x-vnd.Haiku-IntelDiskAddOn
 	:
 	CreationParameterEditor.cpp
 ;