4 files changed, 13 insertions, 2 deletions
diff --git a/src/Fl_SVG_Image.cxx b/src/Fl_SVG_Image.cxx
index c4c593d0a..c76bc962b 100644
--- a/src/Fl_SVG_Image.cxx
+++ b/src/Fl_SVG_Image.cxx
@@ -266,6 +266,12 @@ void Fl_SVG_Image::color_average(Fl_Color c, float i) {
   Fl_RGB_Image::color_average(c, i);
 }
 
+/** Makes sure the object is fully initialized.
+ This function rasterizes the SVG image if that was not done before. */
+void Fl_SVG_Image::normalize() {
+  if (!array) resize(w(), h());
+}
+
 #endif // FLTK_USE_NANOSVG
 
 //
diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index 31f5bd08e..8d09c8759 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -4516,6 +4516,7 @@ void Fl_Cocoa_Window_Driver::icons(const Fl_RGB_Image *icons[], int count) {
   [icon_image release];
   icon_image = nil;
   if (count >= 1 && pWindow->border() && pWindow->label() && strlen(pWindow->label())) {
+    ((Fl_RGB_Image*)icons[0])->normalize();
     icon_image = rgb_to_nsimage(icons[0]);
   }
 }
diff --git a/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx b/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx
index fb449754e..09b677fff 100644
--- a/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx
+++ b/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx
@@ -379,8 +379,10 @@ void Fl_WinAPI_Window_Driver::icons(const Fl_RGB_Image *icons[], int count) {
     icon_->icons = new Fl_RGB_Image*[count];
     icon_->count = count;
     // FIXME: Fl_RGB_Image lacks const modifiers on methods
-    for (int i = 0;i < count;i++)
+    for (int i = 0;i < count;i++) {
       icon_->icons[i] = (Fl_RGB_Image*)((Fl_RGB_Image*)icons[i])->copy();
+      icon_->icons[i]->normalize();
+    }
   }
   
   if (Fl_X::i(pWindow))
diff --git a/src/drivers/X11/Fl_X11_Window_Driver.cxx b/src/drivers/X11/Fl_X11_Window_Driver.cxx
index 4996b3e0f..50a013ba6 100644
--- a/src/drivers/X11/Fl_X11_Window_Driver.cxx
+++ b/src/drivers/X11/Fl_X11_Window_Driver.cxx
@@ -356,8 +356,10 @@ void Fl_X11_Window_Driver::icons(const Fl_RGB_Image *icons[], int count) {
     icon_->icons = new Fl_RGB_Image*[count];
     icon_->count = count;
     // FIXME: Fl_RGB_Image lacks const modifiers on methods
-    for (int i = 0;i < count;i++)
+    for (int i = 0;i < count;i++) {
       icon_->icons[i] = (Fl_RGB_Image*)((Fl_RGB_Image*)icons[i])->copy();
+      icon_->icons[i]->normalize();
+    }
   }
   
   if (Fl_X::i(pWindow))