diff --git a/lib_com/options.h b/lib_com/options.h
index 3ccf81b46b05a56d4b528e29c321505b2cb7d526..2f14642cf5b501928528412a1feee07e6983569a 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -189,6 +189,7 @@
 #define NONBE_FIX_730_DPID_NOT_SET_CORRECTLY                  /* Eri: issue 730: write dpid read from file in correct index, print informative error message when DPID specified is not found. */
 #define NONBE_FIX_825_SBA_JBM_MONO_STEREO_OUTPUT              /* FhG: issue #825: Resolve "JBM SBA: AGC and PCA run twice for MONO and STEREO output"   */
 #define NONBE_FIX_808_JBM_PARAMUPMIX_RS                       /* FhG: Issue 808: fix JBM MC rate switching */
+#define NONBE_FIX_846_JBM_MASA_SIDSTART                       /* FhG: Issue #846: fix JBM for MASA DTX when the first frame is a SID frame */
 
 /* ##################### End NON-BE switches ########################### */
 
diff --git a/lib_dec/ivas_jbm_dec.c b/lib_dec/ivas_jbm_dec.c
index 943e1e694b05a84b0077bc1eaec8d80bdc9ca3ac..a69965d3f9a2c5c99138fbb90b242ee12bec4b29 100644
--- a/lib_dec/ivas_jbm_dec.c
+++ b/lib_dec/ivas_jbm_dec.c
@@ -2034,7 +2034,11 @@ int16_t ivas_jbm_dec_get_num_tc_channels(
         {
             num_tc = CPE_CHANNELS;
         }
-        else if ( st_ivas->ivas_format == MASA_FORMAT && ivas_total_brate < MASA_STEREO_MIN_BITRATE && ( ivas_total_brate > IVAS_SID_5k2 || ( ivas_total_brate <= IVAS_SID_5k2 && st_ivas->nCPE > 0 && st_ivas->hCPE[0]->nchan_out == 1 ) ) )
+        else if ( st_ivas->ivas_format == MASA_FORMAT && ivas_total_brate < MASA_STEREO_MIN_BITRATE && ( ivas_total_brate > IVAS_SID_5k2 || ( ivas_total_brate <= IVAS_SID_5k2 && st_ivas->nCPE > 0 &&
+#ifdef NONBE_FIX_846_JBM_MASA_SIDSTART
+                                                                                                                                              st_ivas->hCPE[0] != NULL &&
+#endif
+                                                                                                                                              st_ivas->hCPE[0]->nchan_out == 1 ) ) )
         {
             num_tc = 1; /* Only one channel transported */
         }