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-rw-r--r--altoslib/AltosConfigData.java4
1 files changed, 4 insertions, 0 deletions
diff --git a/altoslib/AltosConfigData.java b/altoslib/AltosConfigData.java
index d92f42c3..1c3085bd 100644
--- a/altoslib/AltosConfigData.java
+++ b/altoslib/AltosConfigData.java
@@ -336,6 +336,10 @@ public class AltosConfigData implements Iterable<String> {
public double frequency() {
int channel = radio_channel;
int setting = radio_setting;
+
+ if (radio_frequency < 0 && channel < 0 && setting < 0)
+ return -1;
+
if (channel < 0)
channel = 0;
if (setting < 0)