diff --git a/lib_com/options.h b/lib_com/options.h
index 0457cfa56d1810723fa027bb7d854a6f6a034eaa..8fcd2426b811787144566201c07b0b01ce7b8988 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -97,6 +97,7 @@
 #define FIX_FLOAT_1536_INIT_NO_PARAM_LPC                /* FhG: make sure no_param_lpc is initialized in core_encode_twodiv() */
 #define FIX_BASOP_2871_INIT_Q_SYN_FACTOR                /* FhG: make sure, st_fx->Q_syn_factor gets initialized during decoder startup */
 #define FIX_BASOP_2470_POWER_SPEC_E_INIT                /* FhG: make sure powerSpec_e is always initialized in core_signal_analysis_high_bitrate_fx() */
+#define FIX_BASOP_2475_ASSERT_IN_MASA2_REND_TO_MONO     /* Nokia: basop issue 2475: Fix MASA2 to MONO rendering within IVAS_rend */
 
 /* #################### End BE switches ################################## */
 
diff --git a/lib_rend/lib_rend_fx.c b/lib_rend/lib_rend_fx.c
index 822f42882961e61edaab5576e35d417f3bb19e01..639d623930c1cadfe71d5d096c30d7ecd833f688 100644
--- a/lib_rend/lib_rend_fx.c
+++ b/lib_rend/lib_rend_fx.c
@@ -11513,7 +11513,11 @@ static void intermidiate_ext_dirac_render(
             hDirACRend->h_output_synthesis_psd_state.proto_power_smooth_prev_q[1] = add( tmp, hDirACRend->h_output_synthesis_psd_state.proto_power_smooth_prev_q[1] );
             move16();
         }
+#ifdef FIX_BASOP_2475_ASSERT_IN_MASA2_REND_TO_MONO
+        IF( hDirACRend->h_output_synthesis_psd_state.proto_power_diff_smooth_fx != NULL && GT_16( hDirACRend->h_output_synthesis_psd_params.max_band_decorr, 0 ) )
+#else
         IF( hDirACRend->h_output_synthesis_psd_state.proto_power_diff_smooth_fx != NULL )
+#endif
         {
 
             tmp = L_norm_arr( hDirACRend->h_output_synthesis_psd_state.proto_power_diff_smooth_fx, hDirACRend->h_output_synthesis_psd_state.proto_power_diff_smooth_len );
@@ -11522,7 +11526,11 @@ static void intermidiate_ext_dirac_render(
             move16();
         }
 
+#ifdef FIX_BASOP_2475_ASSERT_IN_MASA2_REND_TO_MONO
+        IF( hDirACRend->h_output_synthesis_psd_state.proto_power_diff_smooth_prev_fx != NULL && GT_16( hDirACRend->h_output_synthesis_psd_params.max_band_decorr, 0 ) )
+#else
         IF( hDirACRend->h_output_synthesis_psd_state.proto_power_diff_smooth_prev_fx != NULL )
+#endif
         {
             tmp = L_norm_arr( hDirACRend->h_output_synthesis_psd_state.proto_power_diff_smooth_prev_fx, hDirACRend->h_output_synthesis_psd_state.proto_power_diff_smooth_prev_len );
             scale_sig32( hDirACRend->h_output_synthesis_psd_state.proto_power_diff_smooth_prev_fx, hDirACRend->h_output_synthesis_psd_state.proto_power_diff_smooth_prev_len, tmp ); /* Q(hDirACRend->h_output_synthesis_psd_state.proto_power_diff_smooth_prev_q + tmp) */