diff --git a/lib_dec/dec_tcx_fx.c b/lib_dec/dec_tcx_fx.c
index 883024002ea4c2191cd20d7a5ac09c021b9e6c2f..b9084df8821060f9ee23f849fca3115bb82047dd 100644
--- a/lib_dec/dec_tcx_fx.c
+++ b/lib_dec/dec_tcx_fx.c
@@ -5137,7 +5137,7 @@ void decoder_tcx_imdct_fx(
                 }
             }
 
-            ITF_Detect_fx( x_fx + IGF_START_MN, startLine, endLine, 8 /*maxOrder*/, A_itf_fx, &q_a_itf, &predictionGain_fx, &curr_order, shl( x_e, 1 ) );
+            ITF_Detect_ivas_fx( x_fx + IGF_START_MN, startLine, endLine, 8 /*maxOrder*/, A_itf_fx, &q_a_itf, &predictionGain_fx, &curr_order, q_x );
 
             ITF_Apply_fx( x_fx, startLine, endLine, A_itf_fx, q_a_itf, curr_order );