diff --git a/src/tests/kits/net/DialUpPreflet/DialUpApplication.cpp b/src/tests/kits/net/DialUpPreflet/DialUpApplication.cpp
index cf17059126..376dd6cfce 100644
--- a/src/tests/kits/net/DialUpPreflet/DialUpApplication.cpp
+++ b/src/tests/kits/net/DialUpPreflet/DialUpApplication.cpp
@@ -28,7 +28,7 @@
 #include "DialUpView.h"
 
 
-static const char *kSignature = "application/x-haiku.dial-up-preflet";
+static const char *kSignature = "application/x-vnd.haiku.dial-up-preflet";
 
 
 class DialUpApplication : public BApplication {
diff --git a/src/tests/kits/net/DialUpPreflet/DialUpPreflet.rdef b/src/tests/kits/net/DialUpPreflet/DialUpPreflet.rdef
index 4a919e874b..1e1dd8c9cd 100644
--- a/src/tests/kits/net/DialUpPreflet/DialUpPreflet.rdef
+++ b/src/tests/kits/net/DialUpPreflet/DialUpPreflet.rdef
@@ -2,7 +2,7 @@
 	DialUpPreflet.rdef
 */
 
-resource app_signature "application/x-haiku.dial-up-preflet";
+resource app_signature "application/x-vnd.haiku.dial-up-preflet";
 
 /* BEOS:APP_FLAGS :
    00000000 = 							   SINGLE LAUNCH