diff --git a/src/fourier/euclidian.hpp b/src/fourier/euclidian.hpp
index 2a9c2b1..1fbd480 100644
--- a/src/fourier/euclidian.hpp
+++ b/src/fourier/euclidian.hpp
@@ -200,7 +200,7 @@ namespace CosmoTool
 	      result += 2*(conj(d1[idx]) * d2[idx]).real();
 	    }
 	}
-      if (!even0)
+      if (even0)
 	{
 	  for (long p = 0; p < plane_size; p++)
 	    {