diff --git a/rtengine/ipsharpen.cc b/rtengine/ipsharpen.cc
index 89f497c8e..eaf0db732 100644
--- a/rtengine/ipsharpen.cc
+++ b/rtengine/ipsharpen.cc
@@ -222,7 +222,7 @@ void ImProcFunctions::sharpening (LabImage* lab, const SharpeningParams &sharpen
     if(showMask) {
         // calculate contrast based blend factors to reduce sharpening in regions with low contrast
         JaggedArray<float> blend(W, H);
-        buildBlendMask(lab->L, blend, W, H, sharpenParam.contrast / 100.f);
+        buildBlendMask(lab->L, blend, W, H, sharpenParam.contrast / 100.f, sharpenParam.method == "rld" ? sharpenParam.deconvamount / 100.0 : 1.f);
 #ifdef _OPENMP
         #pragma omp parallel for
 #endif
diff --git a/rtengine/rt_algo.cc b/rtengine/rt_algo.cc
index 21c8eac12..cff145de8 100644
--- a/rtengine/rt_algo.cc
+++ b/rtengine/rt_algo.cc
@@ -193,7 +193,7 @@ void buildBlendMask(float** luminance, rtengine::JaggedArray<float> &blend, int
     if(contrastThreshold == 0.f) {
         for(int j = 0; j < H; ++j) {
             for(int i = 0; i < W; ++i) {
-                blend[j][i] = 1.f;
+                blend[j][i] = amount;
             }
         }
     } else {