diff --git a/rtengine/iplocallab.cc b/rtengine/iplocallab.cc
index b2102fd6a..2d0edb1b8 100644
--- a/rtengine/iplocallab.cc
+++ b/rtengine/iplocallab.cc
@@ -15086,9 +15086,7 @@ void ImProcFunctions::Lab_Local(
     const float b_base = lp.lowB / scaling;
     const bool ctoning = (a_scale != 0.f || b_scale != 0.f || a_base != 0.f || b_base != 0.f);
     const float a_scalemerg = (lp.highAmerg - lp.lowAmerg) / factor / scaling;
-    const float a_basemerg = lp.lowAmerg / scaling;
     const float b_scalemerg = (lp.highBmerg - lp.lowBmerg) / factor / scaling;
-    const float b_basemerg = lp.lowBmerg / scaling;
 
     if (!lp.inv && (lp.chro != 0 || lp.ligh != 0.f || lp.cont != 0 || ctoning || lp.mergemet > 0 ||  lp.strcol != 0.f ||  lp.strcolab != 0.f || lp.qualcurvemet != 0 || lp.showmaskcolmet == 2 || lp.enaColorMask || lp.showmaskcolmet == 3  || lp.showmaskcolmet == 4 || lp.showmaskcolmet == 5 || lp.prevdE) && lp.colorena) { // || lllocalcurve)) { //interior ellipse renforced lightness and chroma  //locallutili
         int ystart = rtengine::max(static_cast<int>(lp.yc - lp.lyT) - cy, 0);