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-rw-r--r--src/gui/math3d/qmatrix4x4.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/gui/math3d/qmatrix4x4.cpp b/src/gui/math3d/qmatrix4x4.cpp
index 1703fa5b0fe..1e0f9295110 100644
--- a/src/gui/math3d/qmatrix4x4.cpp
+++ b/src/gui/math3d/qmatrix4x4.cpp
@@ -4,6 +4,8 @@
#include "qmatrix4x4.h"
#include <QtCore/qmath.h>
#include <QtCore/qvariant.h>
+
+#include <QtGui/qquaternion.h>
#include <QtGui/qtransform.h>
#include <cmath>