diff --git a/lib_com/options.h b/lib_com/options.h
index b530fac825a39908c1ce7e8371531650fc4088f3..73f344208df16718584689c66710ea0acb3c543a 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -177,6 +177,8 @@
 #define NONBE_FIX_1110_STEREO_DTX_BRATE_SWITCHING             /* VA: issue 1110: fix encoder crash in the stereo DTX bitrate switching condition */
 #define NONBE_1131_ACELP_OOB                                  /* VA: issue 1131: fix division-by-zero in acelp gain decoding caused by wrong length of buffer update when switching from HQ core to ACELP core */
 
+#define NONBE_FIX_1128_OSBA_EXT_OUTPUT_ORDER                  /* FhG: issue 1128: set output ambisonics order to input order for EXT output */
+
 /* ##################### End NON-BE switches ########################### */
 
 /* ################## End DEVELOPMENT switches ######################### */
diff --git a/lib_dec/ivas_init_dec.c b/lib_dec/ivas_init_dec.c
index 66d677a65a45370ba645d3e068f82de70e6cc874..bc61b273240e468c5137f28d8180a48a9043769f 100644
--- a/lib_dec/ivas_init_dec.c
+++ b/lib_dec/ivas_init_dec.c
@@ -54,13 +54,29 @@ static ivas_error ivas_read_format( Decoder_Struct *st_ivas, int16_t *num_bits_r
 
 static ivas_error doSanityChecks_IVAS( Decoder_Struct *st_ivas );
 
+
+#ifdef NONBE_FIX_1128_OSBA_EXT_OUTPUT_ORDER
+/*-------------------------------------------------------------------*
+ * ivas_set_audio_config_from_sba_order()
+ *
+ *
+ *-------------------------------------------------------------------*/
+
+/*! r: audio configuration */
+static AUDIO_CONFIG ivas_set_audio_config_from_sba_order(
+    const int16_t sba_order /* i  : Ambisonic (SBA) order           */
+)
+#else
 static AUDIO_CONFIG ivas_set_output_config_from_sba_order( const int16_t sba_order );
 
 
 static AUDIO_CONFIG ivas_set_output_config_from_sba_order( const int16_t sba_order )
+#endif
 {
     AUDIO_CONFIG output_config;
+
     output_config = IVAS_AUDIO_CONFIG_HOA3;
+
     switch ( sba_order )
     {
         case SBA_FOA_ORDER:
@@ -73,11 +89,18 @@ static AUDIO_CONFIG ivas_set_output_config_from_sba_order( const int16_t sba_ord
             output_config = IVAS_AUDIO_CONFIG_HOA3;
             break;
         default:
+#ifdef NONBE_FIX_1128_OSBA_EXT_OUTPUT_ORDER
+            output_config = IVAS_AUDIO_CONFIG_INVALID;
+            break;
+#else
             assert( 0 );
+#endif
     }
+
     return output_config;
 }
 
+
 /*-------------------------------------------------------------------*
  * ivas_dec_setup()
  *
@@ -158,7 +181,11 @@ ivas_error ivas_dec_setup(
             st_ivas->sba_order += 2 * st_ivas->bit_stream[num_bits_read];
             if ( st_ivas->hDecoderConfig->output_config == IVAS_AUDIO_CONFIG_EXTERNAL )
             {
+#ifdef NONBE_FIX_1128_OSBA_EXT_OUTPUT_ORDER
+                st_ivas->hDecoderConfig->output_config = ivas_set_audio_config_from_sba_order( st_ivas->sba_order );
+#else
                 st_ivas->hDecoderConfig->output_config = ivas_set_output_config_from_sba_order( st_ivas->sba_order );
+#endif
                 st_ivas->hDecoderConfig->nchan_out = audioCfg2channels( st_ivas->hDecoderConfig->output_config );
             }
 
@@ -402,7 +429,11 @@ ivas_error ivas_dec_setup(
 
         if ( st_ivas->ivas_format == SBA_FORMAT && st_ivas->hDecoderConfig->output_config == IVAS_AUDIO_CONFIG_EXTERNAL )
         {
+#ifdef NONBE_FIX_1128_OSBA_EXT_OUTPUT_ORDER
+            st_ivas->hDecoderConfig->output_config = ivas_set_audio_config_from_sba_order( st_ivas->sba_order );
+#else
             st_ivas->hDecoderConfig->output_config = ivas_set_output_config_from_sba_order( st_ivas->sba_order );
+#endif
             st_ivas->hDecoderConfig->nchan_out = audioCfg2channels( st_ivas->hDecoderConfig->output_config );
         }
 
@@ -940,7 +971,11 @@ ivas_error ivas_init_decoder(
         }
         else if ( st_ivas->ivas_format == SBA_ISM_FORMAT )
         {
+#ifdef NONBE_FIX_1128_OSBA_EXT_OUTPUT_ORDER
+            hDecoderConfig->nchan_out = audioCfg2channels( ivas_set_audio_config_from_sba_order( st_ivas->sba_order ) );
+#else
             hDecoderConfig->nchan_out = audioCfg2channels( IVAS_AUDIO_CONFIG_HOA3 );
+#endif
             hDecoderConfig->nchan_out += st_ivas->nchan_ism;
         }
         else if ( st_ivas->ivas_format == MASA_ISM_FORMAT || st_ivas->ivas_format == MASA_FORMAT )
@@ -966,6 +1001,13 @@ ivas_error ivas_init_decoder(
         ivas_output_init( &( st_ivas->hOutSetup ), st_ivas->transport_config );
         st_ivas->intern_config = st_ivas->transport_config;
     }
+#ifdef NONBE_FIX_1128_OSBA_EXT_OUTPUT_ORDER
+    else if ( output_config == IVAS_AUDIO_CONFIG_EXTERNAL && st_ivas->ivas_format == SBA_ISM_FORMAT )
+    {
+        st_ivas->intern_config = ivas_set_audio_config_from_sba_order( st_ivas->sba_order );
+        ivas_output_init( &( st_ivas->hOutSetup ), st_ivas->intern_config );
+    }
+#endif
     else
     {
         ivas_output_init( &( st_ivas->hOutSetup ), output_config );
@@ -979,6 +1021,7 @@ ivas_error ivas_init_decoder(
         st_ivas->hOutSetup.nchan_out_woLFE = audioCfg2channels( st_ivas->intern_config );
     }
 
+#ifndef NONBE_FIX_1128_OSBA_EXT_OUTPUT_ORDER
     if ( st_ivas->ivas_format == SBA_ISM_FORMAT && output_config == IVAS_AUDIO_CONFIG_EXTERNAL )
     {
         st_ivas->hOutSetup.ambisonics_order = SBA_HOA3_ORDER;
@@ -987,6 +1030,7 @@ ivas_error ivas_init_decoder(
         st_ivas->hOutSetup.nchan_out_woLFE = audioCfg2channels( IVAS_AUDIO_CONFIG_HOA3 );
     }
 
+#endif
     /* Only initialize transport setup if it is used */
     if ( st_ivas->transport_config != IVAS_AUDIO_CONFIG_INVALID )
     {
diff --git a/lib_dec/ivas_output_config.c b/lib_dec/ivas_output_config.c
index 7284155d9eab659341c722d0536d06216ebfc2c4..d221d11961e004149553bfd16797c0f06c4d4ed1 100644
--- a/lib_dec/ivas_output_config.c
+++ b/lib_dec/ivas_output_config.c
@@ -326,7 +326,11 @@ void ivas_renderer_select(
             {
                 *internal_config = IVAS_AUDIO_CONFIG_FOA;
             }
-            else
+#ifdef NONBE_FIX_1128_OSBA_EXT_OUTPUT_ORDER
+            else if ( output_config != IVAS_AUDIO_CONFIG_EXTERNAL )
+#else
+            if ( output_config != IVAS_AUDIO_CONFIG_EXTERNAL )
+#endif
             {
                 *internal_config = IVAS_AUDIO_CONFIG_HOA3;
             }