diff --git a/lib_dec/dec_tcx_fx.c b/lib_dec/dec_tcx_fx.c
index 4249fd1b690169deb09a07d14e17e15743598073..994546a0ff5a46a72de876f9c1d2a96d8802bd62 100644
--- a/lib_dec/dec_tcx_fx.c
+++ b/lib_dec/dec_tcx_fx.c
@@ -2481,7 +2481,7 @@ void decoder_tcx_fx(
     const Word16 frame_cnt,
     const Word16 sba_dirac_stereo_flag )
 {
-    float x[N_MAX];
+    float x[N_MAX] = { 0 };
     Word32 x_fx[N_MAX];
     Word16 x_e;
     float gainlpc2[FDNS_NPTS];
@@ -2691,7 +2691,18 @@ void decoder_tcx_fx(
     decoder_tcx_noiseshaping_igf( st, L_spec, L_frame, L_frameTCX, left_rect, &x[0], &gainlpc2[0], &tmp_concealment_method, bfi );
 #endif
 
+#ifdef IVAS_FLOAT_FIXED
+            Word32 x_fx_[1200];
+            Word16 q = 26;
+            float maximum = 0;
+            FOR(Word16 ind = 0; ind < 1200; ind++) maximum = fmaxf(maximum, fabsf(x[ind]));
+            if(maximum>=1.f) q = norm_l((Word32)maximum) - 5;
+            FOR(Word16 ind = 0; ind < 1200; ind++) x_fx_[ind] = (Word32)(x[ind] * (1 << q));
+            decoder_tcx_tns_fx( st, L_frame_glob, L_spec, L_frame, L_frameTCX, x_fx_, fUseTns, &tnsData, bfi, frame_cnt, 0 );
+            FOR(Word16 ind = 0; ind < 1200; ind++) x[ind] = (float)(x_fx_[ind]) / (float)(1 << q);
+#else
     decoder_tcx_tns( st, L_frame_glob, L_spec, L_frame, L_frameTCX, &x[0], fUseTns, &tnsData, bfi, frame_cnt, 0 );
+#endif
 
     decoder_tcx_imdct( st, L_frame_glob, L_frameTCX_glob, L_spec, tcx_offset, tcx_offsetFB, L_frame, L_frameTCX, left_rect, &x[0], &xn_buf[0], MDCT_IV,
                        fUseTns, &synth[0], &synthFB[0], bfi, frame_cnt, sba_dirac_stereo_flag );