diff --git a/lib_com/options.h b/lib_com/options.h
index bbea3aa1534059d14c1f9b80304d8ebe81ea7d42..69b0e3d9d98cda5cf06bb4ff0a6ef8c5327b71f2 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -162,6 +162,7 @@
 #define TMP_1342_WORKAROUND_DEC_FLUSH_BROKEN_IN_SR      /* FhG: Temporary workaround for incorrect implementation of decoder flush with split rendering */
 #define NONBE_1122_KEEP_EVS_MODE_UNCHANGED              /* FhG: Disables fix for issue 1122 in EVS mode to keep BE tests green. This switch should be removed once the 1122 fix is added to EVS via a CR.  */
 
+#define FIX_1527_CMR_BITRATE_IDX                        /* Fix for incorrect bitrate idx packed in rtp CMR E-byte */
 
 /* #################### End BE switches ################################## */
 
diff --git a/lib_util/ivas_rtp_payload.c b/lib_util/ivas_rtp_payload.c
index 71b70fcc21f28485f0eb019c970a73069a1bd940..c8fd3bc91cf5741df4a285d37769201bcef98e13 100644
--- a/lib_util/ivas_rtp_payload.c
+++ b/lib_util/ivas_rtp_payload.c
@@ -641,7 +641,11 @@ static uint32_t getBitrateIdx( const uint32_t *table, uint32_t tableLen, uint32_
 
     for ( n = 0; n < tableLen; n++ )
     {
+#ifdef FIX_1527_CMR_BITRATE_IDX
+        if ( bitrate >= ( table[n] * IVAS_NUM_FRAMES_PER_SEC ) )
+#else
         if ( bitrate > ( table[n] * IVAS_NUM_FRAMES_PER_SEC ) )
+#endif
         {
             idx = n;
         }
@@ -707,7 +711,11 @@ static void packEBytes(
             /* EVS Modes */
             bitrate = ( bitrate > 128000 ) ? 128000 : bitrate;
             bitrate = ( bitrate < 5900 ) ? 5900 : bitrate;
+#ifdef FIX_1527_CMR_BITRATE_IDX
+            bitrateIdx = getBitrateIdx( evsFrameSizeInBits, ( sizeof( evsFrameSizeInBits ) / sizeof( evsFrameSizeInBits[0] ) ) - 1, bitrate );
+#else
             bitrateIdx = getBitrateIdx( evsFrameSizeInBits, sizeof( evsFrameSizeInBits ) / sizeof( evsFrameSizeInBits[0] ), bitrate );
+#endif
             BR = (uint8_t) bitrateIdx & MASK_4BIT;
 
             /* If a bandwidth choice cannot be signalled for a given bitrate
@@ -771,7 +779,11 @@ static void packEBytes(
             /* Initial E-Byte */
             bitrate = ( bitrate > 512000 ) ? 512000 : bitrate;
             bitrate = ( bitrate < 13200 ) ? 13200 : bitrate;
+#ifdef FIX_1527_CMR_BITRATE_IDX
+            bitrateIdx = getBitrateIdx( ivasFrameSizeInBits, ( sizeof( ivasFrameSizeInBits ) / sizeof( ivasFrameSizeInBits[0] ) ) - 2, bitrate );
+#else
             bitrateIdx = getBitrateIdx( ivasFrameSizeInBits, sizeof( ivasFrameSizeInBits ) / sizeof( ivasFrameSizeInBits[0] ), bitrate );
+#endif
             BR = (uint8_t) bitrateIdx & MASK_4BIT;
             if ( nByte < maxNumEBytes )
             {