diff --git a/libsrc/mosaicing/interpolate.c b/libsrc/mosaicing/interpolate.c
index e154161e..51f9178c 100644
--- a/libsrc/mosaicing/interpolate.c
+++ b/libsrc/mosaicing/interpolate.c
@@ -465,6 +465,5 @@ vips_interpolate_new( const char *nickname )
 	if( !(type = vips_type_find( "VipsInterpolate", nickname )) )
 		return( NULL );
 
-	return( VIPS_INTERPOLATE( g_object_new( type, 
-		"sharpening", 2.0, NULL ) ) );
+	return( VIPS_INTERPOLATE( g_object_new( type, NULL ) ) );
 }