diff --git a/tools/lib/atnet.c b/tools/lib/atnet.c
index b17170a..94dfcdc 100644
--- a/tools/lib/atnet.c
+++ b/tools/lib/atnet.c
@@ -434,7 +434,7 @@ static int atnet_set_clkm(void *handle, int mhz)
 {
 	struct atnet_dsc *dsc = handle;
 
-	return dialog(dsc, "CLKM %d", mhz);
+	return dialog(dsc, "CLKM %d", mhz) == 0;
 }