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-rw-r--r--src/modules/px4iofirmware/registers.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/modules/px4iofirmware/registers.c b/src/modules/px4iofirmware/registers.c
index 7ef1aa309..b0922f4d6 100644
--- a/src/modules/px4iofirmware/registers.c
+++ b/src/modules/px4iofirmware/registers.c
@@ -602,7 +602,7 @@ registers_set_one(uint8_t page, uint8_t offset, uint16_t value)
if (conf[PX4IO_P_RC_CONFIG_DEADZONE] > 500) {
count++;
}
- if (conf[PX4IO_P_RC_CONFIG_ASSIGNMENT] >= PX4IO_RC_MAPPED_CONTROL_CHANNELS) {
+ if ((int)(conf[PX4IO_P_RC_CONFIG_ASSIGNMENT]) < 0 || conf[PX4IO_P_RC_CONFIG_ASSIGNMENT] >= PX4IO_RC_MAPPED_CONTROL_CHANNELS) {
count++;
}