diff --git a/encode.cc b/encode.cc
index 7d93256..c2a61cd 100644
--- a/encode.cc
+++ b/encode.cc
@@ -83,7 +83,7 @@ struct Encoder
 	}
 	void tone_reservation()
 	{
-		for (int n = 0; n < 10; ++n) {
+		for (int n = 0; n < 100; ++n) {
 			int peak = 0;
 			for (int i = 1; i < symbol_len; ++i)
 				if (norm(tdom[peak]) < norm(tdom[i]))