diff --git a/lib_com/ivas_cnst.h b/lib_com/ivas_cnst.h
index 61639537644a4c4759ab36713d9610a278688aa0..ff0e1972fed39ed84c13a810d60d1d9d415e876c 100755
--- a/lib_com/ivas_cnst.h
+++ b/lib_com/ivas_cnst.h
@@ -229,6 +229,9 @@ typedef enum
 /* format signaling in SID frames */
 #define SID_FORMAT_NBITS                        3                           /* Bit 0 | Bit 1 | Bit 2 */
                                                                             /*-------|-------|------ */
+#ifdef FIX_1384_MSAN_ivas_spar_dec_open
+#define SID_FORMAT_NONE                         (-0x1)                      /*    n/a|    n/a|    n/a*/
+#endif
 #define SID_DFT_STEREO                          0x0                         /*      0|      0|     0 */
 #define SID_MDCT_STEREO                         0x1                         /*      1|      0|     0 */
 #define SID_ISM                                 0x2                         /*      0|      1|     0 */
diff --git a/lib_com/options.h b/lib_com/options.h
index 18b830f2b622f2387e2a569082431706b7a0d93e..ae3cf9667c27ecca49906215ef07e44e6be2ae29 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -166,6 +166,7 @@
 #define TMP_1342_WORKAROUND_DEC_FLUSH_BROKEN_IN_SR      /* FhG: Temporary workaround for incorrect implementation of decoder flush with split rendering */
 #define FIX_1377_HANDLE_ERROR_CODE                      /* Eri: Add missing error code handling from IVAS_REND_SetObjectIDs */
 #define FIX_HRTF_LEFTOVERS                              /* VA: HRTF updates - bring float main in line with BASOP main */
+#define FIX_1384_MSAN_ivas_spar_dec_open                /* VA: issue 1386: fix use-of-uninitialized value in ivas_spar_dec_open() */
 
 /* #################### End BE switches ################################## */
 
diff --git a/lib_dec/ivas_init_dec.c b/lib_dec/ivas_init_dec.c
index 89416ab404d6e0114f6b08587cf52b3d42dc653d..04b1668bbb09be1f075a120793bd55253da541d7 100644
--- a/lib_dec/ivas_init_dec.c
+++ b/lib_dec/ivas_init_dec.c
@@ -1154,6 +1154,9 @@ ivas_error ivas_init_decoder_front(
     st_ivas->ism_mode = ISM_MODE_NONE;
     st_ivas->mc_mode = MC_MODE_NONE;
 
+#ifdef FIX_1384_MSAN_ivas_spar_dec_open
+    st_ivas->sid_format = SID_FORMAT_NONE;
+#endif
     st_ivas->sba_dirac_stereo_flag = 0;
 
     /* HRTF binauralization latency in ns */