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path: root/src/modules/px4iofirmware/mixer.cpp
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-rw-r--r--src/modules/px4iofirmware/mixer.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/modules/px4iofirmware/mixer.cpp b/src/modules/px4iofirmware/mixer.cpp
index 6a4429461..9558198f3 100644
--- a/src/modules/px4iofirmware/mixer.cpp
+++ b/src/modules/px4iofirmware/mixer.cpp
@@ -267,7 +267,7 @@ mixer_callback(uintptr_t handle,
uint8_t control_index,
float &control)
{
- if (control_group > 3)
+ if (control_group >= PX4IO_CONTROL_GROUPS)
return -1;
switch (source) {