diff --git a/lib_com/options.h b/lib_com/options.h
index 131188e6513ce3e9efdd996ae8318c3d97f00b3c..5ef2fe4f5c4e6d683cec5c0b337ef01707234237 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -77,12 +77,15 @@
 #define FIX_1942_ASSERTION_LOWSHELF                          /* FhG: Modified the target_gains_db_fx calculation in compute_t60_coeffs_fx() */
 #define FIX_1944_CRASH_FOR_STEREO                            /* FhG: improve TonalMDCTConceal_InsertNoise calculation precision */
 #define FIX_1970_SBA_CRASH                                   /* Dlb: Fix for issue 1970, SBA crash */
+
 #define FIX_1978_SAT_MISSING_IN_GAIN_ENC                     /* VA:  Fix add saturation missing that lead to a crash in P800-10 */
 
 #define FIX_1979_SAT_MISSING_IN_LSF_ENC                      /* VA: Proposal to fix 1979, saturation in lsf_enc, NOkia to review */
 #define FIX_1946_CRASH_JBM_PROCESSING                        /* FhG: Increased guard bits of DFT_fx */
 #define FIX_1980_CRASH_FDCNG_ENCODESID                       /* FhG: Add one bit of headroom in e_fx calculation in FdCng_encodeSID_ivas_fx() */
 #define FIX_1987_CRASH_OMASA_ENERGY                          /* FhG: Replace cldfbAnalysis_ts_fx_fix_q() with cldfbAnalysis_ts_fx_var_q() to avoid assertion error */
+#define FIX_1985_SBA_714_HF_LOSS                             /* Dlb: Fix for issue 1985, improved dirac ref pow precision*/
+
 /* #################### Start BASOP porting switches ############################ */
 
 #define NONBE_1244_FIX_SWB_BWE_MEMORY                   /* VA: issue 1244: fix to SWB BWE memory in case of switching from FB coding - pending a review by Huawei */
diff --git a/lib_rend/ivas_dirac_rend_fx.c b/lib_rend/ivas_dirac_rend_fx.c
index 38ffe53d1d222d2b235a7fc0992aae3db5b664af..8cfb7d18eb30b5a4d5d4bf7e65fd6ddf3608ac86 100644
--- a/lib_rend/ivas_dirac_rend_fx.c
+++ b/lib_rend/ivas_dirac_rend_fx.c
@@ -2632,10 +2632,48 @@ void protoSignalComputation4_fx(
     Word32 sq_tmp_fx;
     Word32 *p_proto_buffer_fx;
     Word16 min_q_shift, q_shift;
+#ifndef FIX_1985_SBA_714_HF_LOSS
     Word16 min_q_shift2, q_shift2;
+#endif
     Word32 re, im;
     Word16 proto_power_smooth_fx_q, sq_tmp_q;
+#ifdef FIX_1985_SBA_714_HF_LOSS
+    Word64 ref_pow64[CLDFB_NO_CHANNELS_MAX], re64;
+    Word16 sf1, sf2;
+#endif
+
+#ifdef FIX_1985_SBA_714_HF_LOSS
+    FOR( l = 0; l < num_freq_bands; l++ )
+    {
+        re64 = W_mult_32_32( RealBuffer_fx[0][0][l], RealBuffer_fx[0][0][l] );
+        re64 = W_mac_32_32( re64, ImagBuffer_fx[0][0][l], ImagBuffer_fx[0][0][l] );
+        ref_pow64[l] = W_shr( re64, 1 ); // 2*q_cldfb +1
+        move64();
+    }
+    FOR( k = 1; k < 4; k++ )
+    {
+        FOR( l = 0; l < num_freq_bands; l++ )
+        {
+            re64 = W_mult_32_32( RealBuffer_fx[k][0][l], RealBuffer_fx[k][0][l] );
+            re64 = W_mac_32_32( re64, ImagBuffer_fx[k][0][l], ImagBuffer_fx[k][0][l] );
+            ref_pow64[l] = W_add( ref_pow64[l], W_shr( re64, 1 ) ); // 2*q_cldfb +1
+            move64();
+        }
+    }
+    sf1 = W_norm_arr( ref_pow64, s_min( CLDFB_NO_CHANNELS_HALF, num_freq_bands ) );
+    FOR( l = 0; l < s_min( CLDFB_NO_CHANNELS_HALF, num_freq_bands ); l++ )
+    {
+        reference_power_fx[l] = W_extract_h( W_shl( ref_pow64[l], sf1 ) );
+    }
+    reference_power_q[0] = sub( add( shl( q_cldfb, 1 ), sf1 ), 31 );
 
+    sf2 = W_norm_arr( &ref_pow64[CLDFB_NO_CHANNELS_HALF], s_max( 0, sub( num_freq_bands, CLDFB_NO_CHANNELS_HALF ) ) );
+    FOR( l = CLDFB_NO_CHANNELS_HALF; l < num_freq_bands; l++ )
+    {
+        reference_power_fx[l] = W_extract_h( W_shl( ref_pow64[l], sf2 ) );
+    }
+    reference_power_q[1] = sub( add( shl( q_cldfb, 1 ), sf2 ), 31 );
+#else
     min_q_shift = Q31;
     move16();
     q_shift = Q31;
@@ -2695,8 +2733,22 @@ void protoSignalComputation4_fx(
     sq_tmp_q = sub( add( add( q_cldfb, min_q_shift2 ), add( q_cldfb, min_q_shift2 ) ), 31 );
     reference_power_q[1] = sq_tmp_q;
     move16();
+#endif
 
+#ifdef FIX_1985_SBA_714_HF_LOSS
+    min_q_shift = Q31;
+    /* calculate the shift possible for both RealBuffer_fx and ImagBuffer_fx buffers*/
+    FOR( k = 0; k < s_max( 4, nchan_transport ); k++ )
+    {
+        q_shift = L_norm_arr( RealBuffer_fx[k][0], num_freq_bands );
+        min_q_shift = s_min( q_shift, min_q_shift );
+        q_shift = L_norm_arr( ImagBuffer_fx[k][0], num_freq_bands );
+        min_q_shift = s_min( q_shift, min_q_shift );
+    }
+    min_q_shift = sub( min_q_shift, find_guarded_bits_fx( 2 ) );
+#else
     min_q_shift = sub( s_min( q_shift, q_shift2 ), find_guarded_bits_fx( 2 ) );
+#endif
 
     /*For decorrelated diffuseness*/
     FOR( l = 0; l < num_outputs_diff; l++ )