diff --git a/src/SIM/AdaptiveSIM.C b/src/SIM/AdaptiveSIM.C
index 4d94ae81..4d7cb8d7 100644
--- a/src/SIM/AdaptiveSIM.C
+++ b/src/SIM/AdaptiveSIM.C
@@ -215,7 +215,7 @@ bool AdaptiveSIM::adaptMesh (int iStep, std::streamsize outPrec)
     return false;
 
   // Now refine the mesh and write out resulting grid
-  return model.refine(prm) & this->writeMesh(iStep);
+  return model.refine(prm) && this->writeMesh(iStep);
 }