diff --git a/fixes_for_qt5.13.patch b/fixes_for_qt5.13.patch
index 36dbcea..5fccd27 100644
--- a/fixes_for_qt5.13.patch
+++ b/fixes_for_qt5.13.patch
@@ -6,7 +6,7 @@ Index: VirtualBox-6.0.4/include/VBox/VBoxGL2D.h
  /* GL_ARB_pixel_buffer_object*/
  #ifndef Q_WS_MAC
  /* apears to be defined on mac */
-+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
++#if QT_VERSION < 0x50D00
  typedef ptrdiff_t GLsizeiptr;
 +#else
 +typedef long int GLsizeiptr;
@@ -22,7 +22,7 @@ Index: VirtualBox-6.0.4/include/VBox/HostServices/glext.h
  #ifndef GL_VERSION_1_5
  /* GL types for handling large vertex buffer objects */
  typedef ptrdiff_t GLintptr;
-+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
++#if QT_VERSION < 0x50D00
  typedef ptrdiff_t GLsizeiptr;
 +#else
 +typedef long int GLsizeiptr;
@@ -38,7 +38,7 @@ Index: VirtualBox-6.0.4/src/VBox/Additions/3D/mesa/mesa-17.3.9/include/GL/glext.
  #ifndef GL_VERSION_1_5
  #define GL_VERSION_1_5 1
  #include <stddef.h>
-+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
++#if QT_VERSION < 0x50D00
  typedef ptrdiff_t GLsizeiptr;
 +#else
 +typedef long int GLsizeiptr;
@@ -54,7 +54,7 @@ Index: VirtualBox-6.0.4/src/VBox/Additions/x11/x11include/mesa-11.0.7/GL/glcorea
  #ifndef GL_VERSION_1_5
  #define GL_VERSION_1_5 1
  #include <stddef.h>
-+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
++#if QT_VERSION < 0x50D00
  typedef ptrdiff_t GLsizeiptr;
 +#else
 +typedef long int GLsizeiptr;
@@ -70,7 +70,7 @@ Index: VirtualBox-6.0.4/src/VBox/Additions/x11/x11include/mesa-11.0.7/GL/glext.h
  #ifndef GL_VERSION_1_5
  #define GL_VERSION_1_5 1
  #include <stddef.h>
-+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
++#if QT_VERSION < 0x50D00
  typedef ptrdiff_t GLsizeiptr;
 +#else
 +typedef long int GLsizeiptr;
@@ -86,7 +86,7 @@ Index: VirtualBox-6.0.4/src/VBox/Additions/x11/x11include/mesa-7.2/GL/glext.h
  #ifndef GL_VERSION_1_5
  /* GL types for handling large vertex buffer objects */
  typedef ptrdiff_t GLintptr;
-+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
++#if QT_VERSION < 0x50D00
  typedef ptrdiff_t GLsizeiptr;
 +#else
 +typedef long int GLsizeiptr;
@@ -102,7 +102,7 @@ Index: VirtualBox-6.0.4/src/VBox/Devices/Graphics/vmsvga_glext/glext.h
  #ifndef GL_VERSION_1_5
  /* GL types for handling large vertex buffer objects */
  typedef ptrdiff_t GLintptr;
-+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
++#if QT_VERSION < 0x50D00
  typedef ptrdiff_t GLsizeiptr;
 +#else
 +typedef long int GLsizeiptr;
@@ -118,7 +118,7 @@ Index: VirtualBox-6.0.4/src/VBox/GuestHost/OpenGL/include/GL/glext.h
  #ifndef GL_VERSION_1_5
  /* GL types for handling large vertex buffer objects */
  typedef ptrdiff_t GLintptr;
-+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
++#if QT_VERSION < 0x50D00
  typedef ptrdiff_t GLsizeiptr;
 +#else
 +typedef long int GLsizeiptr;
@@ -134,7 +134,7 @@ Index: VirtualBox-6.0.4/src/VBox/GuestHost/OpenGL/include/chromium.h
  #ifndef GL_VERSION_1_5
  
  typedef ptrdiff_t GLintptr;
-+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
++#if QT_VERSION < 0x50d00
  typedef ptrdiff_t GLsizeiptr;
 +#else
 +typedef long int GLsizeiptr;
@@ -142,4 +142,3 @@ Index: VirtualBox-6.0.4/src/VBox/GuestHost/OpenGL/include/chromium.h
  
  /* prototype these functions for opengl_stub/getprocaddress.c */
  extern void APIENTRY glGenQueries(GLsizei n, GLuint *ids);
-
diff --git a/virtualbox.changes b/virtualbox.changes
index cb2464b..5c56c4d 100644
--- a/virtualbox.changes
+++ b/virtualbox.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Fri Apr  5 16:11:40 UTC 2019 - Larry Finger <Larry.Finger@gmail.com>
+
+- Fix file "fixes_for_qt5.13.patch" - macro QT_VERSION_CHECK is not available for Qt < 5.13.
+  Substitute the equivalent (qtmajor << 16 + qtminor << 8).
+
 -------------------------------------------------------------------
 Sun Mar 31 21:02:36 UTC 2019 - Hans-Peter Jansen <hpj@urpla.net>