diff --git a/docs/changes.txt b/docs/changes.txt
index b14ab8300a..b9721259f6 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -574,6 +574,10 @@ All:
 
 - Fix crash if wxCharBuffer fails to allocate the requested amount of memory.
 
+wxGTK:
+
+- Fix wxSpinButton default width under GTK+ 3 (David Hart).
+
 
 3.0-RC2: (released 2013-10-28)
 ------------------------------
diff --git a/src/gtk/spinbutt.cpp b/src/gtk/spinbutt.cpp
index e7c559502b..b211012cef 100644
--- a/src/gtk/spinbutt.cpp
+++ b/src/gtk/spinbutt.cpp
@@ -207,7 +207,13 @@ GdkWindow *wxSpinButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) cons
 
 wxSize wxSpinButton::DoGetBestSize() const
 {
-    wxSize best(15, 26); // FIXME
+    int width =
+#ifdef __WXGTK3__
+    48;
+#else
+    15;
+#endif
+    wxSize best(width, 26); // FIXME
     CacheBestSize(best);
     return best;
 }