diff --git a/encoder/ih264e_api.c b/encoder/ih264e_api.c
index c034681..c46134d 100644
--- a/encoder/ih264e_api.c
+++ b/encoder/ih264e_api.c
@@ -1758,6 +1758,15 @@ static IV_STATUS_T api_check_struct_sanity(iv_obj_t *ps_handle,
                         return IV_FAIL;
                     }
 
+                    if (ps_ip->s_ive_ip.u4_entropy_coding_mode > 1)
+                    {
+                        ps_op->s_ive_op.u4_error_code |= 1
+                                        << IVE_UNSUPPORTEDPARAM;
+                        ps_op->s_ive_op.u4_error_code |=
+                                        IH264E_INVALID_ENTROPY_CODING_MODE;
+                        return IV_FAIL;
+                    }
+
                     break;
                 }
 
diff --git a/encoder/ih264e_error.h b/encoder/ih264e_error.h
index 1eba46c..5a7a560 100644
--- a/encoder/ih264e_error.h
+++ b/encoder/ih264e_error.h
@@ -223,6 +223,9 @@ typedef enum
     /**Not enough memory allocated as output buffer */
     IH264E_INSUFFICIENT_OUTPUT_BUFFER                               = IH264E_CODEC_ERROR_START + 0x30,
 
+    /**Invalid entropy coding mode */
+    IH264E_INVALID_ENTROPY_CODING_MODE                              = IH264E_CODEC_ERROR_START + 0x31,
+
     /**max failure error code to ensure enum is 32 bits wide */
     IH264E_FAIL                                                     = -1,