diff --git a/samples/dev_model/dev_model_sample_ex.c b/samples/dev_model/dev_model_sample_ex.c
index 09880f9..35e4b58 100644
--- a/samples/dev_model/dev_model_sample_ex.c
+++ b/samples/dev_model/dev_model_sample_ex.c
@@ -170,6 +170,7 @@ int command_cb(const char *request_id, const char *identifier, const char *input
         return FAILURE_RET;
     }
     node_cmd_input_set_temp_correction_temp_correction.value.int32_value = atoi(temp_modify);
+    HAL_Free(temp_modify);
 
     if((node_cmd_input_set_temp_correction_temp_correction.value.int32_value <= 10)
         && (node_cmd_input_set_temp_correction_temp_correction.value.int32_value >= -10))