diff --git a/v2.6/toolkit/fastnlotoolkit/fastNLOReader.cc b/v2.6/toolkit/fastnlotoolkit/fastNLOReader.cc
index d80cbc9d418ae056da86d891eec4ed729b2065af..d92275fa1e249f4226c17dd18ed3dab55400f136 100644
--- a/v2.6/toolkit/fastnlotoolkit/fastNLOReader.cc
+++ b/v2.6/toolkit/fastnlotoolkit/fastNLOReader.cc
@@ -1319,7 +1319,7 @@ void fastNLOReader::CalcRefCrossSection() {
 bool fastNLOReader::PrepareCache() {
    // check pdf cache
    const double PDFcks = CalcNewPDFChecksum();
-   if (fPDFCached==0. || (fPDFCached!=0. && fabs(PDFcks/fPDFCached -1.) > 1.e-7)) {
+   if (fPDFCached==0. || (fPDFCached!=0. && fabs(PDFcks/fPDFCached -1.) > 1.e-14)) {
       logger.debug["PrepareCache"]<<"Need to refill PDFCache, since PDFCecksum="<<PDFcks<<" and fPDFCached="<<fPDFCached<<endl;
       FillPDFCache(PDFcks);
    } else  logger.debug["PrepareCache"]<<"No need to refill PDFCache."<<endl;
@@ -2235,7 +2235,7 @@ void fastNLOReader::FillPDFCache(double chksum, bool lForce) {
    }
 
    // is there a need for a recalculation?
-   if (fPDFCached != 0. && fabs(PDFnew/fPDFCached - 1.) < 1.e-7 && !lForce) {
+   if (fPDFCached != 0. && fabs(PDFnew/fPDFCached - 1.) < 1.e-14 && !lForce) {
       logger.debug["FillPDFCache"]<<"No need for a refilling of PDFCache. fPDFCached=RefreshPDFChecksum()"<<PDFnew<<endl;
    } else {
       logger.debug["FillPDFCache"]<<"Refilling PDF cache"<<endl;