diff --git a/lib_com/options.h b/lib_com/options.h
index 5a3e09fe6096fc38a9076b4a456b4921e911aaf7..e5aea3ee7115b05d6ea963f6d99d7f97f59768ee 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -151,10 +151,12 @@
 #define SIMPLIFY_SBA_RENDERING_LOGIC                    /* SBA rendering maintenance related to ticket #45 */
 #define SBA_CLEANING                                    /* SBA maintenance related to ticket #45 */ 
 
-#define REFACTOR_REVERB_INIT_ADD_CFG_CHECKS             /* Simplify and improve reverb initialization + add range checks on config parameter values */ 
+#define REFACTOR_REVERB_INIT_ADD_CFG_CHECKS             /* Simplify and improve reverb initialization + add range checks on config parameter values */
 
 #define DIRAC_DRCT_GAIN_TUNING
 
+#define FIX_34                                          /* Nokia: Fix bug in MASA format EXT output spherical indexing */
+
 /* ################## End DEVELOPMENT switches ######################### */
 /* clang-format on */
 #endif
diff --git a/lib_dec/ivas_masa_dec.c b/lib_dec/ivas_masa_dec.c
index 4bdf5ed614de0ebe46bdd72d013bd4fe9a310195..a18f68225b323e8755f03698c0f0bb9e32cd7b99 100644
--- a/lib_dec/ivas_masa_dec.c
+++ b/lib_dec/ivas_masa_dec.c
@@ -643,7 +643,11 @@ static uint16_t index_theta_phi_16(
         }
         else
         {
+#ifdef FIX_34
+            theta = MASA_ANGLE_AT_EQUATOR * (float) ( id_th + 0.5f );
+#else
             theta = MASA_NTOT2_FAC * (float) ( id_th + 0.5f );
+#endif
             if ( id_th == 1 )
             {
                 cum_n = 2 * (uint16_t) ceilf( MASA_NTOT2_FAC * ( sinf( theta ) - MASA_ASIN_OFFSET ) );