diff --git a/src/apps/poorman/PoorMan.rdef b/src/apps/poorman/PoorMan.rdef
index 8524fc9f1e..ebd4b90759 100644
--- a/src/apps/poorman/PoorMan.rdef
+++ b/src/apps/poorman/PoorMan.rdef
@@ -57,7 +57,7 @@ resource mini_icon array
 	$"FFFFFFFF0000000011111111FFFFFFFF"
 };
 
-resource app_signature "application/x-vnd.Haiku.PoorMan";
+resource app_signature "application/x-vnd.haiku.PoorMan";
 
 resource app_version
 {
diff --git a/src/apps/poorman/constants.cpp b/src/apps/poorman/constants.cpp
index ee80abc7a0..298265c437 100644
--- a/src/apps/poorman/constants.cpp
+++ b/src/apps/poorman/constants.cpp
@@ -3,7 +3,7 @@
 // ------------------------------------------------------
 // PoorMan Window
 extern const char* STR_APP_SIG
-	= "application/x-vnd.OpenBeOS-PoorMan";
+	= "application/x-vnd.haiku.PoorMan";
 			 char* STR_APP_NAME
 	= "PoorMan";
 extern const char* STR_ERR_WEB_DIR