diff --git a/CEP/DP3/DPPP/src/GainCal.cc b/CEP/DP3/DPPP/src/GainCal.cc
index de6fd66510ba4183157fc1a6a24c6034b65bfca6..602343cf43aa09f43343fe89d3560e2f8b6f4786 100644
--- a/CEP/DP3/DPPP/src/GainCal.cc
+++ b/CEP/DP3/DPPP/src/GainCal.cc
@@ -451,7 +451,7 @@ namespace LOFAR {
             iS.h(st,3)=conj(iS.g(st,3));
           }
 
-#pragma omp parallel for
+//#pragma omp parallel for
           for (uint st1=0;st1<nSt;++st1) {
             uint thread=OpenMP::threadNum();
             DComplex* vis_p;
@@ -518,7 +518,7 @@ namespace LOFAR {
           for (uint st=0;st<nUn;++st) {
             iS.h(st,0)=conj(iS.g(st,0));
           }
-#pragma omp parallel for
+//#pragma omp parallel for
           for (uint st1=0;st1<nUn;++st1) {
             uint thread=OpenMP::threadNum();
             DComplex* vis_p;