diff --git a/lib_com/options.h b/lib_com/options.h
index a9f49183cf916eb8b787e2b2ca8d12defbb0fe0a..9089edfddc71d7c9fbfffb7874abc0428787cacf 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -176,6 +176,7 @@
 #define NONBE_1122_KEEP_EVS_MODE_UNCHANGED              /* FhG: Disables fix for issue 1122 in EVS mode to keep BE tests green. This switch should be removed once the 1122 fix is added to EVS via a CR.  */
 #define NONBE_FIX_1337_MISSING_DIRECTIVITY_DISTATT_EXTREND /* Eri: issue 1337: Missing directivity setting and distance attenuation in external renderer IVAS_rend */
 #define NONBE_1329_FIX_OSBA_CRASH                       /* FhG: issue 1329: prevent assert when bit budget is low*/
+#define NONBE_1339_FIXOSBA_EXT_LOUDNESS                 /* FhG: issue 1339: apply scaling with EXT output in OSBA high-BR mode */
 
 /* ##################### End NON-BE switches ########################### */
 
diff --git a/lib_dec/ivas_jbm_dec.c b/lib_dec/ivas_jbm_dec.c
index 147f900af6d878f3906f4f8623fc211107131766..173d031628e204bb5ac217b8ee3a5aee0469e560 100644
--- a/lib_dec/ivas_jbm_dec.c
+++ b/lib_dec/ivas_jbm_dec.c
@@ -1110,6 +1110,12 @@ ivas_error ivas_jbm_dec_render(
                 {
                     mvr2r( p_tc[n], p_output[n], *nSamplesRendered );
                 }
+#ifdef NONBE_1339_FIXOSBA_EXT_LOUDNESS
+                for ( n = 0; n < st_ivas->hDecoderConfig->nchan_out; n++ )
+                {
+                    v_multc( p_output[n], 0.5f, p_output[n], *nSamplesRendered );
+                }
+#endif
             }
             else
             {