diff --git a/FSI/ForceBase.C b/FSI/ForceBase.C
index 48297cdf..42f7f0ce 100644
--- a/FSI/ForceBase.C
+++ b/FSI/ForceBase.C
@@ -160,7 +160,7 @@ std::size_t preciceAdapter::FSI::ForceBase::writeToBuffer(double* buffer,
         if (solverType_.compare("incompressible") == 0)
         {
             forceField.boundaryFieldRef()[patchID] =
-                surface * pb[patchID] * rhob[patchID];
+                0.5 * surface * pb[patchID] * rhob[patchID];
         }
         else if (solverType_.compare("compressible") == 0)
         {