diff --git a/Code/FeatureExtraction/otbTouziEdgeDetectorImageFilter.txx b/Code/FeatureExtraction/otbTouziEdgeDetectorImageFilter.txx
index ead6e83ed2be7fea0bb11268eb1315b701eae36f..775f254d832d0b42fdadb77e83bb9e16bf5a4270 100755
--- a/Code/FeatureExtraction/otbTouziEdgeDetectorImageFilter.txx
+++ b/Code/FeatureExtraction/otbTouziEdgeDetectorImageFilter.txx
@@ -160,8 +160,8 @@ TouziEdgeDetectorImageFilter<TInputImage, TOutputImage, TOutputImageDirection>
   double Theta[NB_DIR];
   
   Theta[0] = 0.;
-  Theta[1] = M_PI / 4. ;
-  Theta[2] = M_PI / 2. ;
+  Theta[1] = M_PI_4 ;
+  Theta[2] = M_PI_2 ;
   Theta[3] = 3*M_PI / 4. ;