diff --git a/wxGTK3-3.0.2-size-alloc-fix.patch b/wxGTK3-3.0.2-size-alloc-fix.patch
new file mode 100644
index 0000000..0e539d6
--- /dev/null
+++ b/wxGTK3-3.0.2-size-alloc-fix.patch
@@ -0,0 +1,36 @@
+diff -up wxWidgets-3.0.2/src/gtk/win_gtk.cpp.size-alloc-fix wxWidgets-3.0.2/src/gtk/win_gtk.cpp
+--- wxWidgets-3.0.2/src/gtk/win_gtk.cpp.size-alloc-fix	2016-04-04 14:55:37.647728846 -0400
++++ wxWidgets-3.0.2/src/gtk/win_gtk.cpp	2016-04-04 14:56:36.199637226 -0400
+@@ -192,8 +192,24 @@ static void pizza_remove(GtkContainer* c
+ }
+ 
+ #ifdef __WXGTK3__
++// Get preferred size of children, to avoid GTK+ warnings complaining
++// that they were size-allocated without asking their preferred size
++static void children_get_preferred_size(const GList* p)
++{
++    for (; p; p = p->next)
++    {
++        const wxPizzaChild* child = static_cast<wxPizzaChild*>(p->data);
++        if (gtk_widget_get_visible(child->widget))
++        {
++            GtkRequisition req;
++            gtk_widget_get_preferred_size(child->widget, &req, NULL);
++        }
++    }
++}
++
+ static void pizza_get_preferred_width(GtkWidget* widget, int* minimum, int* natural)
+ {
++    children_get_preferred_size(WX_PIZZA(widget)->m_children);
+     *minimum = 0;
+     gtk_widget_get_size_request(widget, natural, NULL);
+     if (*natural < 0)
+@@ -202,6 +218,7 @@ static void pizza_get_preferred_width(Gt
+ 
+ static void pizza_get_preferred_height(GtkWidget* widget, int* minimum, int* natural)
+ {
++    children_get_preferred_size(WX_PIZZA(widget)->m_children);
+     *minimum = 0;
+     gtk_widget_get_size_request(widget, NULL, natural);
+     if (*natural < 0)
diff --git a/wxGTK3.spec b/wxGTK3.spec
index b087415..d6c584f 100644
--- a/wxGTK3.spec
+++ b/wxGTK3.spec
@@ -11,7 +11,7 @@
 
 Name:           %{wxgtkname}
 Version:        3.0.2
-Release:        18%{?dist}
+Release:        19%{?dist}
 Summary:        GTK port of the wxWidgets GUI library
 License:        wxWidgets
 Group:          System Environment/Libraries
@@ -61,6 +61,11 @@ Patch9:         %{name}-%{version}-wayland-window-sizing2.patch
 # For more details, see the upstream commits:
 # https://github.com/wxWidgets/wxWidgets/commit/03903c1e459f108e0c464db24064e4cde84f174a
 Patch10:        %{name}-%{version}-media-docs.patch
+# Fixes issue with size allocation in GTK 3.19+
+# For more details, see the upstream commit:
+# https://github.com/wxWidgets/wxWidgets/commit/9fea81c069f9d803d79c4ce82f87a00a6e10b490
+Patch11:	%{name}-%{version}-size-alloc-fix.patch
+
 BuildRequires:  gtk%{gtkver}-devel
 #Note webkitgtk (GTK2) does not appear to be supported
 %if %{gtkver} == 3
@@ -184,6 +189,7 @@ This package provides XML documentation for the %{srcname} library.
 %patch8 -p1 -b .wayland-window-sizing1
 %patch9 -p1 -b .wayland-window-sizing2
 %patch10 -p1 -b .media-docs
+%patch11 -p1 -b .size-alloc-fix
 
 # patch some installed files to avoid conflicts with 2.8.*
 sed -i -e 's|aclocal)|aclocal/wxwin3.m4)|' Makefile.in
@@ -321,6 +327,9 @@ popd
 %doc docs/doxygen/out/xml/*
 
 %changelog
+* Mon Apr  4 2016 Tom Callaway <tcallawa@redhat.com> - 3.0.2-19
+- Add patch to resolve window sizing issue with gtk 3.19+
+
 * Sun Mar 20 2016 Scott Talbert <swt@techie.net> - 3.0.2-18
 - Add patch for wxEVT_MEDIA_XXX event types (for Phoenix)