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-rw-r--r--src/gui/math3d/qquaternion.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/gui/math3d/qquaternion.h b/src/gui/math3d/qquaternion.h
index d4c91c430a..21b051e08e 100644
--- a/src/gui/math3d/qquaternion.h
+++ b/src/gui/math3d/qquaternion.h
@@ -40,6 +40,7 @@
#ifndef QQUATERNION_H
#define QQUATERNION_H
+#include <QtGui/qtguiglobal.h>
#include <QtGui/qgenericmatrix.h>
#include <QtGui/qvector3d.h>
#include <QtGui/qvector4d.h>