diff --git a/xrd.py b/xrd.py
index 02b8a1f..eeca5a0 100644
--- a/xrd.py
+++ b/xrd.py
@@ -128,8 +128,8 @@ def process_command(tef: AutoFMAM, data: bytes, state: State, conn: socket.socke
             mode = TEF6686.TuneTo_Mode.FM_Jump
             if tef.modulation == Modulation.AM: mode = TEF6686.TuneTo_Mode.Preset
 
-            if freq < 27000: tef.modulation = Modulation.AM
-            elif freq > 64000: tef.modulation = Modulation.FM
+            if freq <= 27000: tef.modulation = Modulation.AM
+            elif freq >= 64000: tef.modulation = Modulation.FM
             else:
                 out += f"!Invalid frequency".encode()
                 continue