diff --git a/funcs/fmorpho.c b/funcs/fmorpho.c
index a3a4ce55..23069ea6 100644
--- a/funcs/fmorpho.c
+++ b/funcs/fmorpho.c
@@ -40,7 +40,7 @@ typedef struct
 static fpixel	pixels[9];
 
 /* --------------------------------------------------------------------- !*/
-static int comparaison(const void *A, const void *B)
+static int comparaison_fgris(const void *A, const void *B)
 {
 return ((fpixel *)A)->fgris > ((fpixel *)B)->fgris;
 }
@@ -52,11 +52,11 @@ int fimg_filtre_morpho_0(FloatImg *sfimg, FloatImg *dfimg, int index)
 {
 int		xs, ys, loop9;
 int		xp, yp;
-float		rgb[3], fval;
+float		rgb[3];
 
-#if DEBUG_LEVEL
+// #if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %p %p   %d )\n", __func__, sfimg, dfimg, index);
-#endif
+// #endif
 
 if ( (index<0) || (index>8)) {
 	fprintf(stderr, " %s: bad index %d\n", __func__, index);
@@ -77,7 +77,7 @@ for (ys=1; ys<sfimg->height-1; ys++) {
 			pixels[loop9].fgris = rgb[0];
 			pixels[loop9].rang  = loop9;
 			}
-		qsort(&pixels, 9, sizeof(fpixel), comparaison);
+		qsort(&pixels, 9, sizeof(fpixel), comparaison_fgris);
 		rgb[0] = rgb[1] = rgb[2] = pixels[index].fgris;
 		fimg_put_rgb(dfimg, xs, ys, rgb);
 		}