diff --git a/rtengine/demosaic_algos.cc b/rtengine/demosaic_algos.cc
index b81dfe576..6a5b8eba8 100644
--- a/rtengine/demosaic_algos.cc
+++ b/rtengine/demosaic_algos.cc
@@ -1878,9 +1878,7 @@ SSEFUNCTION void RawImageSource::lmmse_interpolate_omp(int winw, int winh, array
     if(applyGamma) {
         gamtab = &(Color::igammatab_24_17);
     } else {
-        for(int i = 0; i < 65536; i++) {
-            (*gamtab)[i] = i;
-        }
+        gamtab->makeIdentity();
     }
 
     array2D<float> (*rgb[3]);