diff --git a/tools/fimgfx.c b/tools/fimgfx.c
index 869e9f2..0fc8084 100644
--- a/tools/fimgfx.c
+++ b/tools/fimgfx.c
@@ -50,7 +50,7 @@ Fx fx_list[] = {
 	{ "binarize",		Fx_binarize,	0,	1 },
 	{ "trinarize",		Fx_trinarize,	0,	1 },
 	{ "hilightr",		Fx_hilight_R,	0,	1 },
-	{ "abs",		Fx_absolute,	0,	0 },
+	{ "abs",		Fx_absolute,	0,	1 },
 	{ NULL,			0,		0,	0 }
 	};