diff --git a/Sources/CMenuItem.cpp b/Sources/CMenuItem.cpp
index 3784641..4332c8a 100644
--- a/Sources/CMenuItem.cpp
+++ b/Sources/CMenuItem.cpp
@@ -45,7 +45,7 @@ CMenuItem::CMenuItem(BMenu *subMenu)
 	{
 		sfBitmap = new BBitmap(BRect(0, 0, 15, 15), B_COLOR_8_BIT);
 		
-		BMimeType mime("application/x-mw-BeIDE");
+		BMimeType mime(PE_DEFAULT_IDE_APPSIG);
 		mime.GetIcon(sfBitmap, B_MINI_ICON);
 	}
 } /* CMenuItem::CMenuItem */
diff --git a/Sources/PDoc.cpp b/Sources/PDoc.cpp
index df1dc27..301e417 100644
--- a/Sources/PDoc.cpp
+++ b/Sources/PDoc.cpp
@@ -187,7 +187,7 @@ void PDoc::InitWindow(const char *name)
 	// add the BeIDE menu, if desired
 	if (showIde)
 	{
-		BMimeType mime("application/x-mw-BeIDE");
+		BMimeType mime(PE_DEFAULT_IDE_APPSIG);
 		if (mime.IsInstalled())
 		{
 			BMenu *menu = HResources::GetMenu(rid_Menu_DwBeide);
@@ -1886,8 +1886,9 @@ void PDoc::ShowRecentMenu(BPoint where, bool showalways)
 void PDoc::IDEBringToFront()
 {
 	entry_ref ide;
-	if (be_roster->FindApp("application/x-mw-BeIDE", &ide))
-		THROW(("BeIDE was not found"));
+
+	if (be_roster->FindApp(PE_DEFAULT_IDE_APPSIG, &ide))
+		THROW((PE_DEFAULT_IDE_NAME " was not found"));
 
 	if (be_roster->IsRunning(&ide))
 		be_roster->ActivateApp(be_roster->TeamFor(&ide));
@@ -1944,8 +1945,8 @@ void PDoc::IDEMake()
 	msg.AddData("target", PROPERTY_TYPE, &item, sizeof(item));
 
 	entry_ref ide;
-	if (be_roster->FindApp("application/x-mw-BeIDE", &ide))
-		THROW(("BeIDE was not found"));
+	if (be_roster->FindApp(PE_DEFAULT_IDE_APPSIG, &ide))
+		THROW((PE_DEFAULT_IDE_NAME " was not found"));
 
 	if (be_roster->IsRunning(&ide))
 	{
diff --git a/Sources/Utils.cpp b/Sources/Utils.cpp
index 4b444a2..944f0b2 100644
--- a/Sources/Utils.cpp
+++ b/Sources/Utils.cpp
@@ -158,8 +158,9 @@ void OpenInTracker(const entry_ref& ref)
 void SendToIDE(const BMessage& msg, BMessage *reply)
 {
 	entry_ref ide;
-	if (be_roster->FindApp("application/x-mw-BeIDE", &ide))
-		THROW(("BeIDE was not found"));
+
+	if (be_roster->FindApp(PE_DEFAULT_IDE_APPSIG, &ide))
+		THROW((PE_DEFAULT_IDE_NAME " was not found"));
 
 	if (be_roster->IsRunning(&ide))
 	{
diff --git a/Sources/pe.h b/Sources/pe.h
index f0d8044..4699447 100644
--- a/Sources/pe.h
+++ b/Sources/pe.h
@@ -102,4 +102,13 @@
 #include <map>
 #include <string>
 
+#ifdef __HAIKU__
+	#define PE_DEFAULT_IDE_APPSIG "application/x-vnd.dw-Paladin"
+	#define PE_DEFAULT_IDE_NAME "Paladin"
+#else
+	#define PE_DEFAULT_IDE_APPSIG "application/x-mw-BeIDE"
+	#define PE_DEFAULT_IDE_NAME "BeIDE"
+#endif
+
+
 #endif // PE_H