diff --git a/lib_com/options.h b/lib_com/options.h
old mode 100755
new mode 100644
index a24b45626f2d41cbb471ba89b96e97985bb826c7..2d346ef5916926dcd05c79e1df9c941a721e296d
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -162,6 +162,7 @@
 
 #define FIX_HBR_MASAMETA                                /* Nokia: Fixes to HBR MASA metadata at 384 and 512 kbps. Addresses issues 438 and 477 as well. */
 #define FIX_482_DUMMYDEC_INIT                           /* Nokia: fix issue #428: missing inits for dummyDec in IVAS_rend */
+#define FIX_468_16KHZ_PUPMIX                            /* Dlb: Fix issue 468 for Param Upmix at 16kHz sampling rate */
 
 /* ################## End DEVELOPMENT switches ######################### */
 /* clang-format on */
diff --git a/lib_enc/ivas_mc_paramupmix_enc.c b/lib_enc/ivas_mc_paramupmix_enc.c
index fc093c3f59644e9a5538fbe5a389a8ed126fab8d..997b0043ac4f62e51363c6fb40569e2eb03e9b34 100644
--- a/lib_enc/ivas_mc_paramupmix_enc.c
+++ b/lib_enc/ivas_mc_paramupmix_enc.c
@@ -729,6 +729,9 @@ static void ivas_mc_paramupmix_param_est_enc(
 
     int16_t l_ts;
     int16_t b, i, j, ts, bnd;
+#ifdef FIX_468_16KHZ_PUPMIX
+    int16_t maxbands;
+#endif
 
     int16_t transient_det[MC_PARAMUPMIX_COMBINATIONS][2];
     int16_t transient_det_l[2], transient_det_r[2];
@@ -804,11 +807,18 @@ static void ivas_mc_paramupmix_param_est_enc(
         }
         ivas_enc_cov_handler_process( hMCParamUpmix->hCovEnc[b], pp_in_fr_real, pp_in_fr_imag, cov_real, cov_dtx_real, hMCParamUpmix->hFbMixer->pFb, 0, hMCParamUpmix->hFbMixer->pFb->filterbank_num_bands, MC_PARAMUPMIX_NCH, 0 /*dtx_vad*/, transient_det[b], HOA_md_ind );
     }
-
+#ifdef FIX_468_16KHZ_PUPMIX
+    maxbands = hMCParamUpmix->hFbMixer->pFb->filterbank_num_bands;
+    for ( b = 0; b < MC_PARAMUPMIX_COMBINATIONS; b++ )
+    {
+        for ( bnd = 0; bnd < maxbands; bnd++ )
+        {
+#else
     for ( b = 0; b < MC_PARAMUPMIX_COMBINATIONS; b++ )
     {
         for ( bnd = 0; bnd < IVAS_MAX_NUM_BANDS; bnd++ )
         {
+#endif
             rxy = hMCParamUpmix->cov_real[b][1][0][bnd];
             ryy = hMCParamUpmix->cov_real[b][1][1][bnd];
             cmat = rxy / ( ryy + EPSILON );
@@ -822,6 +832,18 @@ static void ivas_mc_paramupmix_param_est_enc(
             betas[b][bnd] = (float) 2.0 * wetaux;
         }
     }
-
+#ifdef FIX_468_16KHZ_PUPMIX
+    if ( maxbands < IVAS_MAX_NUM_BANDS )
+    {
+        for ( b = 0; b < MC_PARAMUPMIX_COMBINATIONS; b++ )
+        {
+            for ( bnd = maxbands; bnd < IVAS_MAX_NUM_BANDS; bnd++ )
+            {
+                alphas[b][bnd] = 0.0;
+                betas[b][bnd] = 0.0;
+            }
+        }
+    }
+#endif
     return;
 }