diff --git a/opm/simulators/wells/MultisegmentWellAssemble.cpp b/opm/simulators/wells/MultisegmentWellAssemble.cpp
index 0a1650201..f279fba02 100644
--- a/opm/simulators/wells/MultisegmentWellAssemble.cpp
+++ b/opm/simulators/wells/MultisegmentWellAssemble.cpp
@@ -243,7 +243,7 @@ assemblePressureEq(const int seg,
     // contribution from the outlet segment
     eqns.residual()[seg][SPres] -= outlet_pressure.value();
     for (int pv_idx = 0; pv_idx < numWellEq; ++pv_idx) {
-        eqns.D()[seg][outlet_segment_index][SPres][pv_idx] = -outlet_pressure.derivative(pv_idx + Indices::numEq);
+        eqns.D()[seg][outlet_segment_index][SPres][pv_idx] -= outlet_pressure.derivative(pv_idx + Indices::numEq);
     }
 }