1 files changed, 1 insertions, 1 deletions
diff --git a/source/blender/freestyle/intern/geometry/matrix_util.cpp b/source/blender/freestyle/intern/geometry/matrix_util.cpp
index ecf5443a957..35503a37685 100644
--- a/source/blender/freestyle/intern/geometry/matrix_util.cpp
+++ b/source/blender/freestyle/intern/geometry/matrix_util.cpp
@@ -106,7 +106,7 @@ void semi_definite_symmetric_eigen(const double *mat, int n, double *eigen_vec,
           delta = a_ll - a_mm;
 
           if (delta == 0.0) {
-            x = -M_PI / 4;
+            x = -M_PI_4;
           }
           else {
             x = -atan((a_lm + a_lm) / delta) / 2.0;