diff --git a/src/tests/kits/net/DialUpPreflet/DialUpView.cpp b/src/tests/kits/net/DialUpPreflet/DialUpView.cpp
index 97677a6886..a4492757b0 100644
--- a/src/tests/kits/net/DialUpPreflet/DialUpView.cpp
+++ b/src/tests/kits/net/DialUpPreflet/DialUpView.cpp
@@ -786,6 +786,7 @@ DialUpView::LoadAddons()
 	GeneralAddon *fGeneralAddon = new GeneralAddon(&fAddons);
 	fAddons.AddPointer(DUN_TAB_ADDON_TYPE, fGeneralAddon);
 	fAddons.AddPointer(DUN_DELETE_ON_QUIT, fGeneralAddon);
+
 	// "IPCP" protocol
 	IPCPAddon *ipcpAddon = new IPCPAddon(&fAddons);
 	fAddons.AddPointer(DUN_TAB_ADDON_TYPE, ipcpAddon);
@@ -794,7 +795,7 @@ DialUpView::LoadAddons()
 	PPPoEAddon *pppoeAddon = new PPPoEAddon(&fAddons);
 	fAddons.AddPointer(DUN_DEVICE_ADDON_TYPE, pppoeAddon);
 	fAddons.AddPointer(DUN_DELETE_ON_QUIT, pppoeAddon);
-	
+
 	// "PAP" authenticator
 	BMessage addon;
 #ifdef LANG_GERMAN
@@ -813,7 +814,7 @@ DialUpView::LoadAddons()
 
 
 void
-DialUpView::AddInterface(const char *name, bool isNew = false)
+DialUpView::AddInterface(const char *name, bool isNew)
 {
 	if(fInterfaceMenu->FindItem(name)) {
 		(new BAlert(kErrorTitle, kErrorInterfaceExists, kLabelOK,
@@ -835,7 +836,7 @@ DialUpView::AddInterface(const char *name, bool isNew = false)
 
 
 void
-DialUpView::SelectInterface(int32 index, bool isNew = false)
+DialUpView::SelectInterface(int32 index, bool isNew)
 {
 	BMenuItem *item = fInterfaceMenu->FindMarked();
 	if(fCurrentItem && item == fCurrentItem)
diff --git a/src/tests/kits/net/DialUpPreflet/InterfaceUtils.cpp b/src/tests/kits/net/DialUpPreflet/InterfaceUtils.cpp
index aae28c6ee0..03743ecca7 100644
--- a/src/tests/kits/net/DialUpPreflet/InterfaceUtils.cpp
+++ b/src/tests/kits/net/DialUpPreflet/InterfaceUtils.cpp
@@ -28,12 +28,12 @@
 #include <MenuItem.h>
 #include <Screen.h>
 #include <String.h>
-#include <StringItem.h>
+#include <ListItem.h>	// Contains StringItem class declaration
 #include <Window.h>
 
 
 BPoint
-center_on_screen(BRect rect, BWindow *window = NULL)
+center_on_screen(BRect rect, BWindow *window)
 {
 	BRect screenFrame = (BScreen(window).Frame());
 	BPoint point((screenFrame.Width() - rect.Width()) / 2.0,
@@ -46,7 +46,7 @@ center_on_screen(BRect rect, BWindow *window = NULL)
 
 
 int32
-FindNextMenuInsertionIndex(BMenu *menu, const char *name, int32 index = 0)
+FindNextMenuInsertionIndex(BMenu *menu, const char *name, int32 index)
 {
 	BMenuItem *item;
 	for(; index < menu->CountItems(); index++) {
diff --git a/src/tests/kits/net/DialUpPreflet/MessageDriverSettingsUtils.cpp b/src/tests/kits/net/DialUpPreflet/MessageDriverSettingsUtils.cpp
index 3c1724ecf8..4a27ba0739 100644
--- a/src/tests/kits/net/DialUpPreflet/MessageDriverSettingsUtils.cpp
+++ b/src/tests/kits/net/DialUpPreflet/MessageDriverSettingsUtils.cpp
@@ -36,7 +36,7 @@ static bool AddParameters(const BMessage& message, driver_settings *to);
 
 bool
 FindMessageParameter(const char *name, const BMessage& message, BMessage *save,
-	int32 *startIndex = NULL)
+	int32 *startIndex)
 {
 	// XXX: this should be removed when we can replace BMessage with something better
 	BString string;
diff --git a/src/tests/kits/net/DialUpPreflet/TextRequestDialog.cpp b/src/tests/kits/net/DialUpPreflet/TextRequestDialog.cpp
index 23d8f9b06c..514e7bc8c9 100644
--- a/src/tests/kits/net/DialUpPreflet/TextRequestDialog.cpp
+++ b/src/tests/kits/net/DialUpPreflet/TextRequestDialog.cpp
@@ -44,7 +44,7 @@ static const char *kLabelCancel = "Cancel";
 
 
 TextRequestDialog::TextRequestDialog(const char *title, const char *information,
-		const char *request, const char *text = NULL)
+		const char *request, const char *text)
 	: BWindow(kWindowRect, title, B_MODAL_WINDOW, B_NOT_RESIZABLE | B_NOT_CLOSABLE, 0),
 	fInvoker(NULL)
 {