diff --git a/rtengine/dcraw.cc b/rtengine/dcraw.cc
index 9a934c85f..e5b732581 100644
--- a/rtengine/dcraw.cc
+++ b/rtengine/dcraw.cc
@@ -9381,29 +9381,29 @@ t5.set ();
                 double d = tpp->defGain * image[i* ::width+j][1];
                 if (d>64000)
                     continue;
-                avg_g += d*d*d*d*d*d;
+                avg_g += d;
                 gn++;
             }
             if (FISRED(filter,i,j)) {
                 double d = tpp->defGain * image[i* ::width+j][0];
                 if (d>64000)
                     continue;
-                avg_r += d*d*d*d*d*d;
+                avg_r += d;
                 rn++;
             }
             if (FISBLUE(filter,i,j)) {
                 double d = tpp->defGain * image[i* ::width+j][2];
                 if (d>64000)
                     continue;
-                avg_b += d*d*d*d*d*d;
+                avg_b += d;
                 bn++;
             }
         }
     }
 
-    double reds   = pow (avg_r/rn, 1.0/6.0) * tpp->camwbRed;
-    double greens = pow (avg_g/gn, 1.0/6.0) * tpp->camwbGreen;
-    double blues  = pow (avg_b/bn, 1.0/6.0) * tpp->camwbBlue;
+    double reds   = avg_r/rn * tpp->camwbRed;
+    double greens = avg_g/gn * tpp->camwbGreen;
+    double blues  = avg_b/bn * tpp->camwbBlue;
     
     double rm = rgb_cam[0][0]*reds + rgb_cam[0][1]*greens + rgb_cam[0][2]*blues;
     double gm = rgb_cam[1][0]*reds + rgb_cam[1][1]*greens + rgb_cam[1][2]*blues;
diff --git a/rtengine/stdimagesource.cc b/rtengine/stdimagesource.cc
index a42a72d26..e1bc98165 100644
--- a/rtengine/stdimagesource.cc
+++ b/rtengine/stdimagesource.cc
@@ -475,7 +475,8 @@ ColorTemp StdImageSource::getAutoWB () {
             avg_b += intpow((double)img->b[i][j], p);
             n++;
         }
-    return ColorTemp (pow(avg_r/n, 1.0/p), pow(avg_g/n, 1.0/p), pow(avg_b/n, 1.0/p));
+	return ColorTemp (avg_r/n, avg_g/n, avg_b/n);
+    //return ColorTemp (pow(avg_r/n, 1.0/p), pow(avg_g/n, 1.0/p), pow(avg_b/n, 1.0/p));
 }
 
 void StdImageSource::transformPixel (int x, int y, int tran, int& tx, int& ty) {