diff --git a/AMDiS/src/ProblemVec.cc b/AMDiS/src/ProblemVec.cc
index 41403824029c8c13d2e366bf9b85d87421a51bcb..dca638316311d7379d4cd796871e80084fa4bfdb 100644
--- a/AMDiS/src/ProblemVec.cc
+++ b/AMDiS/src/ProblemVec.cc
@@ -772,12 +772,12 @@ namespace AMDiS {
  				 assembleFlag);     
     }  
 
-//     if (asmMatrix) {
+    if (asmMatrix) {
       solverMatrix.setMatrix(*systemMatrix);
       createPrecon();
 
       INFO(info, 8)("fillin of assembled matrix: %d\n", nnz);
-//     }
+    }
 
 #ifdef _OPENMP
     INFO(info, 8)("buildAfterCoarsen needed %.5f seconds system time / %.5f seconds wallclock time\n",