diff --git a/src/curve.c b/src/curve.c
index 82d2ea8..18f573c 100644
--- a/src/curve.c
+++ b/src/curve.c
@@ -135,22 +135,24 @@ int GuiCurveLogY(Curve *curve, gdouble y) /* not really a log */
  ***/
 
 void GuiUpdateCurveGeometry(Curve *curve, char *largest_left_label, int right_padding)
-{  GtkAllocation *a = &curve->widget->allocation;
+{  GtkAllocation a = {0};
    int w,h; 
 
+   gtk_widget_get_allocation(curve->widget, &a);
+
    /* Top and bottom margins */
 
    GuiSetText(curve->layout, curve->leftLabel, &w, &h);
    curve->topY = h + 10;
 
    GuiSetText(curve->layout, "0123456789", &w, &h);
-   curve->bottomY = a->height - h - 10;
+   curve->bottomY = a.height - h - 10;
 
    /* Left and right margins */
 
    GuiSetText(curve->layout, largest_left_label, &w, &h);
    curve->leftX   = 5 + 6 + 3 + w;
-   curve->rightX  = a->width - right_padding;
+   curve->rightX  = a.width - right_padding;
 
    /* Add space for the lograithmic curve */
 
diff --git a/src/help-dialogs.c b/src/help-dialogs.c
index 17eaf8c..9bab9f5 100644
--- a/src/help-dialogs.c
+++ b/src/help-dialogs.c
@@ -235,7 +235,9 @@ void GuiFreeLabelWithOnlineHelp(LabelWithOnlineHelp *lwoh)
 
 static gboolean wrapper_fix_cb(GtkWidget *widget, GdkEventExpose *event, gpointer data)
 {  int *last_width = (int*)data;
-   int label_width = widget->allocation.width;
+   GtkAllocation a = {0};
+   gtk_widget_get_allocation(widget, &a);
+   int label_width = a.width;
    
    if(*last_width == label_width)  /* short circuit expose events */ 
       return FALSE;                /* without size changes */
diff --git a/src/read-adaptive-window.c b/src/read-adaptive-window.c
index 8de2900..ccade53 100644
--- a/src/read-adaptive-window.c
+++ b/src/read-adaptive-window.c
@@ -158,10 +158,11 @@ static void redraw_spiral(GtkWidget *widget)
 /* Calculate the geometry of the spiral */
 
 static void update_geometry(GtkWidget *widget)
-{  GtkAllocation *a = &widget->allocation;
+{  GtkAllocation a = {0};
+   gtk_widget_get_allocation(widget, &a);
 
-   Closure->readAdaptiveSpiral->mx = a->width - 15 - Closure->readAdaptiveSpiral->diameter / 2;
-   Closure->readAdaptiveSpiral->my = a->height / 2;
+   Closure->readAdaptiveSpiral->mx = a.width - 15 - Closure->readAdaptiveSpiral->diameter / 2;
+   Closure->readAdaptiveSpiral->my = a.height / 2;
 }
 
 /* Expose event handler */
@@ -339,11 +340,12 @@ void GuiResetAdaptiveReadWindow()
 
    if(Closure->readAdaptiveDrawingArea->window)
    {  static GdkRectangle rect;
-      GtkAllocation *a = &Closure->readAdaptiveDrawingArea->allocation;
+      GtkAllocation a = {0};
+      gtk_widget_get_allocation(Closure->readAdaptiveDrawingArea, &a);
 
       rect.x = rect.y = 0;
-      rect.width  = a->width;
-      rect.height = a->height;
+      rect.width  = a.width;
+      rect.height = a.height;
 
       gdk_window_clear(Closure->readAdaptiveDrawingArea->window);
       gdk_window_invalidate_rect(Closure->readAdaptiveDrawingArea->window, &rect, FALSE);
diff --git a/src/read-linear-window.c b/src/read-linear-window.c
index 40ebe9b..592e81e 100644
--- a/src/read-linear-window.c
+++ b/src/read-linear-window.c
@@ -280,7 +280,8 @@ void GuiMarkExistingSectors(void)
 
 static void update_geometry(void)
 {  GtkWidget *widget = Closure->readLinearDrawingArea;
-   GtkAllocation *a = &widget->allocation;
+   GtkAllocation a = {0};
+   gtk_widget_get_allocation(widget, &a);
 
    /* Curve geometry */ 
 
@@ -289,8 +290,8 @@ static void update_geometry(void)
 
    /* Spiral center */
 
-   Closure->readLinearSpiral->mx = a->width - 15 - Closure->readLinearSpiral->diameter / 2;
-   Closure->readLinearSpiral->my = a->height / 2;
+   Closure->readLinearSpiral->mx = a.width - 15 - Closure->readLinearSpiral->diameter / 2;
+   Closure->readLinearSpiral->my = a.height / 2;
 
    if(Closure->crcBuf && Closure->crcBuf->crcCached)
    {  int w,h;
diff --git a/src/rs01-verify.c b/src/rs01-verify.c
index a43e138..698a659 100644
--- a/src/rs01-verify.c
+++ b/src/rs01-verify.c
@@ -141,7 +141,8 @@ static void redraw_spiral(RS01Widgets *wl)
 
 static gboolean expose_cb(GtkWidget *widget, GdkEventExpose *event, gpointer data)
 {  RS01Widgets *wl = (RS01Widgets*)data;
-   GtkAllocation *a = &widget->allocation;
+   GtkAllocation a = {0};
+   gtk_widget_get_allocation(widget, &a);
    int w,h,size;
 
    /* Finish spiral initialization */
@@ -154,8 +155,8 @@ static gboolean expose_cb(GtkWidget *widget, GdkEventExpose *event, gpointer dat
    GuiSetText(wl->cmpLayout, _("Missing sectors"), &w, &h);
    size = wl->cmpSpiral->diameter + 20 + 3*(10+h);  /* approx. size of spiral + labels */
 
-   wl->cmpSpiral->mx = a->width / 2;
-   wl->cmpSpiral->my = (wl->cmpSpiral->diameter + a->height - size)/2;
+   wl->cmpSpiral->mx = a.width / 2;
+   wl->cmpSpiral->my = (wl->cmpSpiral->diameter + a.height - size)/2;
 
    if(event->count) /* Exposure compression */
    {  return TRUE;
diff --git a/src/rs02-verify.c b/src/rs02-verify.c
index ac0d677..19f8db6 100644
--- a/src/rs02-verify.c
+++ b/src/rs02-verify.c
@@ -134,7 +134,8 @@ static void redraw_spiral(RS02Widgets *wl)
 
 static gboolean expose_cb(GtkWidget *widget, GdkEventExpose *event, gpointer data)
 {  RS02Widgets *wl = (RS02Widgets*)data;
-   GtkAllocation *a = &widget->allocation;
+   GtkAllocation a = {0};
+   gtk_widget_get_allocation(widget, &a);
    int w,h,size;
 
    /* Finish spiral initialization */
@@ -147,8 +148,8 @@ static gboolean expose_cb(GtkWidget *widget, GdkEventExpose *event, gpointer dat
    GuiSetText(wl->cmpLayout, _("Missing sectors"), &w, &h);
    size = wl->cmpSpiral->diameter + 20 + 3*(10+h);  /* approx. size of spiral + labels */
 
-   wl->cmpSpiral->mx = a->width / 2;
-   wl->cmpSpiral->my = (wl->cmpSpiral->diameter + a->height - size)/2;
+   wl->cmpSpiral->mx = a.width / 2;
+   wl->cmpSpiral->my = (wl->cmpSpiral->diameter + a.height - size)/2;
 
    if(!event->count)      /* Exposure compression */
      redraw_spiral(wl);   /* Redraw the spiral */
diff --git a/src/rs03-verify.c b/src/rs03-verify.c
index a11fa72..1bbfcbe 100644
--- a/src/rs03-verify.c
+++ b/src/rs03-verify.c
@@ -144,7 +144,8 @@ static void redraw_spiral(RS03Widgets *wl)
 
 static gboolean expose_cb(GtkWidget *widget, GdkEventExpose *event, gpointer data)
 {  RS03Widgets *wl = (RS03Widgets*)data;
-   GtkAllocation *a = &widget->allocation;
+   GtkAllocation a = {0};
+   gtk_widget_get_allocation(widget, &a);
    int w,h,size;
 
    /* Finish spiral initialization */
@@ -157,8 +158,8 @@ static gboolean expose_cb(GtkWidget *widget, GdkEventExpose *event, gpointer dat
    GuiSetText(wl->cmpLayout, _("Missing sectors"), &w, &h);
    size = wl->cmpSpiral->diameter + 20 + 3*(10+h);  /* approx. size of spiral + labels */
 
-   wl->cmpSpiral->mx = a->width / 2;
-   wl->cmpSpiral->my = (wl->cmpSpiral->diameter + a->height - size)/2;
+   wl->cmpSpiral->mx = a.width / 2;
+   wl->cmpSpiral->my = (wl->cmpSpiral->diameter + a.height - size)/2;
 
    if(!event->count)      /* Exposure compression */
      redraw_spiral(wl);   /* Redraw the spiral */
diff --git a/src/spiral.c b/src/spiral.c
index 99b299a..483c3a7 100644
--- a/src/spiral.c
+++ b/src/spiral.c
@@ -70,12 +70,13 @@ Spiral* GuiCreateSpiral(GdkColor *outline, GdkColor *fill,
 }
 
 void GuiSetSpiralWidget(Spiral *spiral, GtkWidget *widget)
-{  GtkAllocation *al = &widget->allocation;
+{  GtkAllocation a = {0};
+   gtk_widget_get_allocation(widget, &a);
 
    if(!spiral->drawable)
    {  spiral->drawable     = widget->window;
-      spiral->mx           = al->width/2;
-      spiral->my           = al->height/2;
+      spiral->mx           = a.width/2;
+      spiral->my           = a.height/2;
    }
 }