diff --git a/src/unitvector.hh b/src/unitvector.hh
index 0c2dd5d19f61996bdce77be5e5af0655b0563efa..00cd167701103b6b04aa5f7d209c4ea7637e1e59 100644
--- a/src/unitvector.hh
+++ b/src/unitvector.hh
@@ -125,7 +125,6 @@ public:
 
         // Bring it all together
         result = A;
-        result *= -2;
         result.axpy(derivativeOfArcCosSquared(sp), B);
 
         return result;