diff --git a/arch/arm64/src/imx9/imx9_flexio_pwm.c b/arch/arm64/src/imx9/imx9_flexio_pwm.c
index be123a464d1..4d05a15b115 100644
--- a/arch/arm64/src/imx9/imx9_flexio_pwm.c
+++ b/arch/arm64/src/imx9/imx9_flexio_pwm.c
@@ -602,6 +602,11 @@ static int pwm_start(struct pwm_lowerhalf_s *dev,
           break;
         }
 
+      if (info->channels[i].channel == 0)
+        {
+          continue;
+        }
+
       ret = pwm_update_duty(priv, info->channels[i].channel,
                             info->channels[i].duty);
     }
diff --git a/arch/arm64/src/imx9/imx9_tpm_pwm.c b/arch/arm64/src/imx9/imx9_tpm_pwm.c
index bfc7884d92d..35a639f9225 100644
--- a/arch/arm64/src/imx9/imx9_tpm_pwm.c
+++ b/arch/arm64/src/imx9/imx9_tpm_pwm.c
@@ -541,6 +541,11 @@ static int pwm_start(struct pwm_lowerhalf_s *dev,
           break;
         }
 
+      if (info->channels[i].channel == 0)
+        {
+          continue;
+        }
+
       ret = pwm_update_duty(priv, info->channels[i].channel,
                             info->channels[i].duty);
     }