<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;"> include/qwt3d_openglhelper.h |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/include/qwt3d_openglhelper.h b/include/qwt3d_openglhelper.h
index e5499c2..a7ecddc 100644
--- a/include/qwt3d_openglhelper.h
+++ b/include/qwt3d_openglhelper.h
@@ -8,6 +8,11 @@
 #include &lt;QtOpenGL/qgl.h&gt;
 #endif
 
+#if QT_VERSION &lt; 0x047999
+#include &lt;GL/glu.h&gt;
+#endif
+
+
 namespace Qwt3D
 {
 
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