diff --git a/rtengine/ipwavelet.cc b/rtengine/ipwavelet.cc
index 0f09f1ddd..93e4da318 100644
--- a/rtengine/ipwavelet.cc
+++ b/rtengine/ipwavelet.cc
@@ -2753,13 +2753,13 @@ void ImProcFunctions::ContAllL (float *koeLi[12], float *maxkoeLi, bool lipschit
 
         if (cp.reinforce == 3) {
             if(rad < lim0 / 60.f && level == 0) {
-                expkoef *= repart;    //reduce effect for low values of rad and level=0==> quasi only level 1 is effective
+                expkoef *= abs(repart);    //reduce effect for low values of rad and level=0==> quasi only level 1 is effective
             }
         }
 
         if (cp.reinforce == 1) {
             if(rad < lim0 / 60.f && level == 1) {
-                expkoef /= repart;    //increase effect for low values of rad and level=1==> quasi only level 0 is effective
+                expkoef /= abs(repart);    //increase effect for low values of rad and level=1==> quasi only level 0 is effective
             }
         }