diff --git a/decoder/ixheaacd_cnst.h b/decoder/ixheaacd_cnst.h
index b96422b..cee0a58 100644
--- a/decoder/ixheaacd_cnst.h
+++ b/decoder/ixheaacd_cnst.h
@@ -108,6 +108,7 @@
 #define MAX_SHORT_WINDOWS 8
 
 #define MAX_NUM_CHANNELS 6
+#define MAX_NUM_CHANNELS_USAC_LVL2 2
 
 #define SFB_NUM_MAX ((NSFB_SHORT + 1) * MAX_SHORT_IN_LONG_BLOCK)
 
diff --git a/decoder/ixheaacd_process.c b/decoder/ixheaacd_process.c
index b87b61a..2347834 100644
--- a/decoder/ixheaacd_process.c
+++ b/decoder/ixheaacd_process.c
@@ -316,7 +316,7 @@ WORD32 ixheaacd_usac_process(ia_dec_data_struct *pstr_dec_data,
         nr_core_coder_channels = 1;
 
       core_data_extracting:
-        if (ch_offset >= MAX_NUM_CHANNELS) return -1;
+        if (ch_offset >= MAX_NUM_CHANNELS_USAC_LVL2) return -1;
         err = ixheaacd_core_coder_data(ele_id, pstr_usac_data, elem_idx,
                                        &ch_offset, it_bit_buff,
                                        nr_core_coder_channels);