diff --git a/lib_com/ivas_cnst.h b/lib_com/ivas_cnst.h
index 7d84adbb12c971c785f1f08baeff0bd98035fb9b..0512cf27e6e4f8004af29f667e3097e234dd26a0 100644
--- a/lib_com/ivas_cnst.h
+++ b/lib_com/ivas_cnst.h
@@ -1319,7 +1319,11 @@ typedef enum
 #define PANNING_ELE_RESOLUTION                  5
 
 #define EFAP_MAX_CHAN_NUM                       5                           /* Maximum number of channels that constitute a polygon, 4 or 5 */
+#ifdef ALLRAD_OPTIM
+#define EFAP_MAX_POLY_SET                       50                          /* Upper bound on number of polygons; with a Speaker setup of 16.0, we obtain 44 polygons/triangles in the matlab implementation. */
+#else
 #define EFAP_MAX_POLY_SET                       70                          /* Upper bound on number of polygons; with a Speaker setup of 26.0, we obtain 54 polygons/triangles in the matlab implementation. */
+#endif
 
 #define EFAP_MODE_EFAP                          0                           /* EFAP Panning */
 #define EFAP_MODE_EFIP                          1                           /* EFIP Panning */
diff --git a/lib_com/options.h b/lib_com/options.h
index 87edfc787edce348c10670ba0a1dcf337012b3b2..27d1004fbdb8b7ae9a0c74f55b122e96995faaba 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -152,6 +152,7 @@
 #define FIX_155_HP20_ISSUE                              /* Issue 155: apply hp20 on all input channels instead of just 2 channels */
 #define EFAP_FIX_POLY                                   /* Issue 167: fix bug in EFAP polygon selection */
 #define SBA_HOA_HBR_IMPROV                              /* issue 91: Improvements to SBA high bitrate HOA3 coding */
+#define ALLRAD_OPTIM                                    /* Issue 159: Optimize memory allocation for ALLRAD */
 #define FIX_I178_HQ_BUFFER_OVERRUN                      /* issue 178: Buffer overrun in HQ core decoder -- spectral filling buffer did not account for extended transition frame in IVAS */
 #define PRINT_SBA_ORDER                                 /* Issue 179: print-out also the SBA order of IVAS SBA format to stdout */
 
diff --git a/lib_dec/ivas_allrad_dec.c b/lib_dec/ivas_allrad_dec.c
index d4301c07ace13144d07d34b30e1468d9e9c6a6a5..13e4f3c2410bae840e59d1d2908bb83012764c94 100644
--- a/lib_dec/ivas_allrad_dec.c
+++ b/lib_dec/ivas_allrad_dec.c
@@ -108,7 +108,11 @@ ivas_error ivas_sba_get_hoa_dec_matrix(
 
     /* Allocate memory */
     assert( *hoa_dec_mtx == NULL && "hoa_dec_mtx != NULL" );
+#ifdef ALLRAD_OPTIM
+    if ( ( *hoa_dec_mtx = (float *) count_malloc( SBA_NHARM_HOA3 * ( hOutSetup.nchan_out_woLFE ) * sizeof( float ) ) ) == NULL )
+#else
     if ( ( *hoa_dec_mtx = (float *) count_malloc( SBA_NHARM_HOA3 * MAX_OUTPUT_CHANNELS * sizeof( float ) ) ) == NULL )
+#endif
     {
         return ( IVAS_ERROR( IVAS_ERR_FAILED_ALLOC, "ALLRAD: Cannot allocate memory!" ) );
     }