diff --git a/lib_com/options.h b/lib_com/options.h
index 929ae2b05d72c8b69d4afd8116cb90f16d6346ae..4a5a53c9875ce1551eab189919b257c3f28c64e9 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -164,6 +164,7 @@
 #define NONBE_FIX_991_PARAMBIN_BINARY_HRTF              /* Nokia: issue #991: fix using of binary file HRTF in ParamBin (to activate when USE_NEW_HRTF_BINARY_FILE_FORMAT and FIX_777_COMBI_RENDER_CONFIG_FILE are on ) */
 
 #define FIX_1741_REVERB_TIMES_Q_FORMAT                  /* Philips: reverberation times in Q26 format instead of Q31 */
+#define FIX_1831_REVERB_REGRESSION                      /* Philips: fixes reverb regression issues  */
 
 /* #################### End BASOP porting switches ############################ */
 
diff --git a/lib_rend/ivas_reverb_fx.c b/lib_rend/ivas_reverb_fx.c
index b4b9f7d1ef02a7c2cbea89c3043d5a77ec49a6e8..5156911f327f550c558d1169dad100ffb7afde06 100644
--- a/lib_rend/ivas_reverb_fx.c
+++ b/lib_rend/ivas_reverb_fx.c
@@ -2426,6 +2426,10 @@ ivas_error ivas_binaural_reverb_init(
     Word32 t60[CLDFB_NO_CHANNELS_MAX];
     Word32 ene[CLDFB_NO_CHANNELS_MAX];
     Word16 preDelay;
+#ifdef FIX_1831_REVERB_REGRESSION
+    Word16 temp16, s;
+    Word32 temp32;
+#endif
 
     error = IVAS_ERR_OK;
 
@@ -2442,7 +2446,14 @@ ivas_error ivas_binaural_reverb_init(
             return error;
         }
 
+#ifdef FIX_1831_REVERB_REGRESSION
+        temp16 = BASOP_Util_Divide3216_Scale( 48000, CLDFB_NO_CHANNELS_MAX, &s );
+        temp16 = shl( temp16, s );                                            // Q0
+        temp32 = Mult_32_16( roomAcoustics->acousticPreDelay_fx, temp16 );    // Q11
+        preDelay = extract_l( L_shr( L_add( temp32, L_shl( 1, 10 ) ), 11 ) ); // Q0
+#else
         preDelay = (int16_t) roundf( 48000.0f * roomAcoustics->acousticPreDelay / CLDFB_NO_CHANNELS_MAX );
+#endif
 #ifdef FIX_1741_REVERB_TIMES_Q_FORMAT
         floatToFixed_arrL( t60_temp, t60, Q26, CLDFB_NO_CHANNELS_MAX );
 #else