diff --git a/src/preferences/backgrounds/Backgrounds.cpp b/src/preferences/backgrounds/Backgrounds.cpp
index 3bdd3fb915..eefec953bb 100644
--- a/src/preferences/backgrounds/Backgrounds.cpp
+++ b/src/preferences/backgrounds/Backgrounds.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2005, Haiku, Inc. All Rights Reserved.
+ * Copyright 2002-2006, Haiku, Inc. All Rights Reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -15,7 +15,7 @@
 #include <Window.h>
 
 
-static const char *kSignature = "application/x-vnd.haiku.Backgrounds";
+static const char *kSignature = "application/x-vnd.haiku-backgrounds";
 
 
 class BackgroundsApplication : public BApplication {
diff --git a/src/preferences/backgrounds/Backgrounds.rdef b/src/preferences/backgrounds/Backgrounds.rdef
index 90d855ff0e..65c55822cb 100644
--- a/src/preferences/backgrounds/Backgrounds.rdef
+++ b/src/preferences/backgrounds/Backgrounds.rdef
@@ -57,7 +57,7 @@ resource mini_icon
 	$"FFFF00000E0F0F0F0F0F0F000F0F0FFF"
 };
 
-resource app_signature "application/x-vnd.haiku.Backgrounds";
+resource app_signature "application/x-vnd.haiku-backgrounds";
 
 resource app_version
 {
diff --git a/src/preferences/screen/Constants.h b/src/preferences/screen/Constants.h
index 00d2060346..96fb941043 100644
--- a/src/preferences/screen/Constants.h
+++ b/src/preferences/screen/Constants.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2001-2005, Haiku.
+ * Copyright 2001-2006, Haiku.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -37,7 +37,8 @@ static const uint32 DIM_COUNT_MSG = 'scrf';
 static const uint32 MAKE_INITIAL_MSG = 'mkin';
 
 // Constants
-static const char kAppSignature[] = "application/x-vnd.Be-SCRN";
+extern const char* kBackgroundsSignature;
+
 static const int32 gMinRefresh = 45;	// This is the minimum selectable refresh
 static const int32 gMaxRefresh = 140;	// This is the maximum selectable refresh
 
diff --git a/src/preferences/screen/MonitorView.cpp b/src/preferences/screen/MonitorView.cpp
index 9c53671c40..154cd657a5 100644
--- a/src/preferences/screen/MonitorView.cpp
+++ b/src/preferences/screen/MonitorView.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright 2001-2005, Haiku.
+ * Copyright 2001-2006, Haiku.
  * Copyright 2002, Thomas Kurschel.
  * Distributed under the terms of the MIT License.
  *
@@ -45,7 +45,7 @@ MonitorView::AttachedToWindow()
 void
 MonitorView::MouseDown(BPoint point)
 {
-	be_roster->Launch("application/x-vnd.Be-BACK");
+	be_roster->Launch(kBackgroundsSignature);
 }
 
 
diff --git a/src/preferences/screen/ScreenApplication.cpp b/src/preferences/screen/ScreenApplication.cpp
index 4cf7f739f2..fb8b1f8f3a 100644
--- a/src/preferences/screen/ScreenApplication.cpp
+++ b/src/preferences/screen/ScreenApplication.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright 2001-2005, Haiku.
+ * Copyright 2001-2006, Haiku.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -18,6 +18,9 @@
 #include <Alert.h>
 
 
+static const char* kAppSignature = "application/x-vnd.Be-SCRN";
+
+
 ScreenApplication::ScreenApplication()
 	:	BApplication(kAppSignature),
 	fScreenWindow(new ScreenWindow(new ScreenSettings()))
diff --git a/src/preferences/screen/ScreenWindow.cpp b/src/preferences/screen/ScreenWindow.cpp
index ac191f7b32..78c8bf00cd 100644
--- a/src/preferences/screen/ScreenWindow.cpp
+++ b/src/preferences/screen/ScreenWindow.cpp
@@ -57,6 +57,8 @@
 	// undefine to get standard refresh rates from driver
 
 
+const char* kBackgroundsSignature = "application/x-vnd.haiku-backgrounds";
+
 // list of officially supported colour spaces
 static const struct {
 	color_space	space;
@@ -836,7 +838,7 @@ ScreenWindow::MessageReceived(BMessage* message)
 			break;
 
 		case BUTTON_LAUNCH_BACKGROUNDS_MSG:
-			be_roster->Launch("application/x-vnd.Be-BACK");
+			be_roster->Launch(kBackgroundsSignature);
 			break;
 
 		case BUTTON_DEFAULTS_MSG: