diff --git a/src/osx/cocoa/glcanvas.mm b/src/osx/cocoa/glcanvas.mm
index 59c572e73b..44646ba9c8 100644
--- a/src/osx/cocoa/glcanvas.mm
+++ b/src/osx/cocoa/glcanvas.mm
@@ -33,6 +33,7 @@
 #endif
 
 #include "wx/osx/private.h"
+#include "wx/osx/private/available.h"
 
 WXGLContext WXGLCreateContext( WXGLPixelFormat pixelFormat, WXGLContext shareContext )
 {
@@ -199,6 +200,14 @@ bool wxGLContext::SetCurrent(const wxGLCanvas& win) const
 
     [m_glContext makeCurrentContext];
 
+    // At least under macOS 10.14.5 we need to do this in order to update the
+    // context with the new size information after the window is resized.
+    if ( WX_IS_MACOS_AVAILABLE_FULL(10, 14, 5) )
+    {
+        NSOpenGLView *v = (NSOpenGLView *)win.GetHandle();
+        [v setOpenGLContext: m_glContext];
+    }
+
     return true;
 }