diff --git a/contrib/gtkgensurf/gendlgs.cpp b/contrib/gtkgensurf/gendlgs.cpp
index c6ce5c98..ed72569c 100644
--- a/contrib/gtkgensurf/gendlgs.cpp
+++ b/contrib/gtkgensurf/gendlgs.cpp
@@ -640,7 +640,7 @@ static void ReadDlgValues( int tab ){
 // =============================================================================
 // main dialog callbacks
 
-static void switch_page( GtkNotebook *notebook, GtkNotebookPage *page, guint page_num, gpointer data ){
+static void switch_page( GtkNotebook *notebook, GtkWidget *page, guint page_num, gpointer data ){
 	if ( current_tab != page_num ) {
 		if ( page_num == FIXPOINTS_TAB ) {
 			OldPreview = Preview;
diff --git a/contrib/prtview/ConfigDialog.cpp b/contrib/prtview/ConfigDialog.cpp
index 9f995a28..758fc62c 100644
--- a/contrib/prtview/ConfigDialog.cpp
+++ b/contrib/prtview/ConfigDialog.cpp
@@ -245,7 +245,6 @@ void DoConfigDialog(){
 	GtkWidget *transslider, *translabel, *clipslider, *cliplabel;
 	GtkWidget *show2check, *show3check, *portalcheck;
 	int loop = 1, ret = IDCANCEL;
-	GtkObject *adj;
 
 	dlg = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 	gtk_window_set_transient_for( GTK_WINDOW( dlg ), GTK_WINDOW( g_pRadiantWnd ) );
@@ -277,7 +276,7 @@ void DoConfigDialog(){
 	gtk_widget_show( hbox );
 	gtk_box_pack_start( GTK_BOX( vbox2 ), hbox, TRUE, TRUE, 0 );
 
-	adj = gtk_adjustment_new( portals.width_3d, 2, 40, 1, 1, 0 );
+	auto *adj = gtk_adjustment_new( portals.width_3d, 2, 40, 1, 1, 0 );
 	lw3slider = gtk_hscale_new( GTK_ADJUSTMENT( adj ) );
 	gtk_widget_show( lw3slider );
 	gtk_box_pack_start( GTK_BOX( hbox ), lw3slider, TRUE, TRUE, 0 );
diff --git a/libs/gtkutil/clipboard.cpp b/libs/gtkutil/clipboard.cpp
index 7810fa23..9ee4196f 100644
--- a/libs/gtkutil/clipboard.cpp
+++ b/libs/gtkutil/clipboard.cpp
@@ -111,11 +111,11 @@ static void clipboard_clear( GtkClipboard *clipboard, gpointer data ){
 }
 
 static void clipboard_received( GtkClipboard *clipboard, GtkSelectionData *data, gpointer user_data ){
-	if ( data->length < 0 ) {
+	if ( gtk_selection_data_get_length( data ) < 0 ) {
 		globalErrorStream() << "Error retrieving selection\n";
 	}
-	else if ( strcmp( gdk_atom_name( data->type ), clipboard_targets[0].target ) == 0 ) {
-		BufferInputStream istream( reinterpret_cast<const char*>( data->data ), data->length );
+	else if ( strcmp( gdk_atom_name( gtk_selection_data_get_data_type( data ) ), clipboard_targets[0].target ) == 0 ) {
+		BufferInputStream istream( reinterpret_cast<const char*>( gtk_selection_data_get_data( data ) ), gtk_selection_data_get_length( data ) );
 		( *reinterpret_cast<ClipboardPasteFunc*>( user_data ) )( istream );
 	}
 }
diff --git a/radiant/groupdialog.cpp b/radiant/groupdialog.cpp
index df6e0d01..64f83768 100644
--- a/radiant/groupdialog.cpp
+++ b/radiant/groupdialog.cpp
@@ -84,7 +84,7 @@ void GroupDialog_updatePageTitle( GtkWindow* window, std::size_t pageIndex ){
 	}
 }
 
-static gboolean switch_page( GtkNotebook *notebook, GtkNotebookPage *page, guint page_num, gpointer data ){
+static gboolean switch_page( GtkNotebook *notebook, GtkWidget *page, guint page_num, gpointer data ){
 	GroupDialog_updatePageTitle( GTK_WINDOW( data ), page_num );
 	g_current_page = page_num;