diff --git a/lib_com/ivas_cnst.h b/lib_com/ivas_cnst.h
index 3d9cf4e7a14062cbe73f3dde715f6186253d1fd1..3c8e35c7c1446875326b4f4463f81ca6f9e766d0 100644
--- a/lib_com/ivas_cnst.h
+++ b/lib_com/ivas_cnst.h
@@ -936,7 +936,7 @@ typedef enum
 
 #define SPAR_CONFIG_BW                          FB
 
-#define IVAS_SPAR_MAX_CH                        (2*IVAS_MAX_SBA_ORDER + 2) /* FOA + planar HOA */
+#define IVAS_SPAR_MAX_CH                        (FOA_CHANNELS + 2 * ( IVAS_MAX_SBA_ORDER - 1 )) /* FOA + planar HOA */
 
 #define IVAS_SPAR_P_LOWERTRI                    ((IVAS_SPAR_MAX_CH - 1) * (IVAS_SPAR_MAX_CH - 2)) >> 1
 #define IVAS_SPAR_MAX_C_COEFF                   (IVAS_SPAR_MAX_CH - IVAS_SPAR_MAX_DMX_CHS) * ( IVAS_SPAR_MAX_DMX_CHS - 1)
diff --git a/lib_dec/ivas_dirac_dec.c b/lib_dec/ivas_dirac_dec.c
index b4da8ef0205677a01f8b4c6cdfdc1455ce6c6196..1af46684909d866cf85110ba4873ca833436fec5 100644
--- a/lib_dec/ivas_dirac_dec.c
+++ b/lib_dec/ivas_dirac_dec.c
@@ -1814,7 +1814,7 @@ void ivas_dirac_dec(
 #ifdef DEBUG_MODE_DIRAC
     {
 #ifdef HARMONIZE_SBA_NCHAN_TRANSPORT
-        int16_t n, tmp[1 * L_FRAME48k];
+        int16_t n, tmp[IVAS_SPAR_MAX_CH * L_FRAME48k];
 #else
         int16_t n, tmp[DIRAC_MAX_TRANS_CHANS * L_FRAME48k];
 #endif