diff --git a/MagickWand/mogrify.c b/MagickWand/mogrify.c
index d2dd383..211e6d6 100644
--- a/MagickWand/mogrify.c
+++ b/MagickWand/mogrify.c
@@ -2188,7 +2188,8 @@
           {
             (void) SyncImageSettings(mogrify_info,*image);
             (void) ParseGeometry(argv[i+1],&geometry_info);
-            mogrify_image=OilPaintImage(*image,geometry_info.rho,exception);
+            mogrify_image=OilPaintImage(*image,geometry_info.rho,
+              geometry_info.sigma,exception);
             break;
           }
         if (LocaleCompare("pen",option+1) == 0)