diff --git a/src/data/beos_mime/text/html b/src/data/beos_mime/text/html
index d62207dbc3..137c0384ff 100644
--- a/src/data/beos_mime/text/html
+++ b/src/data/beos_mime/text/html
@@ -10,7 +10,7 @@ resource(2, "META:SNIFF_RULE") #'CSTR' array {
 
 resource(3, "META:S:DESC") #'MSDC' "HTML File";
 
-resource(4, "META:PREF_APP") #'MSIG' "application/x-vnd.Be-NPOS";
+resource(4, "META:PREF_APP") #'MSIG' "application/x-vnd.mozilla-firefox";
 
 resource(5, "META:EXTENS") message(234) {
 	"extensions" = "htm",
diff --git a/src/data/beos_mime/text/x-source-code b/src/data/beos_mime/text/x-source-code
index 5c614448f6..d71636779f 100644
--- a/src/data/beos_mime/text/x-source-code
+++ b/src/data/beos_mime/text/x-source-code
@@ -24,7 +24,7 @@ resource(4, "META:EXTENS") message(234) {
 	"type" = "text/x-source-code"
 };
 
-resource(5, "META:PREF_APP") #'MSIG' "application/x-vnd.Haiku-StyledEdit";
+resource(5, "META:PREF_APP") #'MSIG' "application/x-vnd.beunited.pe";
 
 resource(6, "META:ICON") #'VICN' array {
 	$"6E6369660505010200060338D2F73CD163BF82B23B84A94B88504870C900B6F5"
diff --git a/src/data/beos_mime/text/x-vnd.be.resourcedef b/src/data/beos_mime/text/x-vnd.be.resourcedef
index 1a44b57413..f75cd9391d 100644
--- a/src/data/beos_mime/text/x-vnd.be.resourcedef
+++ b/src/data/beos_mime/text/x-vnd.be.resourcedef
@@ -15,7 +15,7 @@ resource(3, "META:EXTENS") message(234) {
 	"type" = "text/x-vnd.be.resourcedef"
 };
 
-//resource(5, "META:PREF_APP") #'MSIG' "application/x-vnd.haiku.styled-edit";
+//resource(5, "META:PREF_APP") #'MSIG' "application/x-vnd.beunited.pe";
 
 resource(4, "META:ICON") #'VICN' array {
 	$"6E63696607050102000603399E0F3D9C0ABF82B23B84A94B88504870C900A5B1"
diff --git a/src/data/beos_mime/text/xml b/src/data/beos_mime/text/xml
index 1b46292ea7..fe427d7ce1 100644
--- a/src/data/beos_mime/text/xml
+++ b/src/data/beos_mime/text/xml
@@ -10,4 +10,4 @@ resource(3, "META:EXTENS") message(234) {
 	"type" = "text/xml"
 };
 
-resource(4, "META:PREF_APP") #'MSIG' "application/x-vnd.Haiku-StyledEdit";
+resource(4, "META:PREF_APP") #'MSIG' "application/x-vnd.beunited.pe";