diff --git a/lib_com/options.h b/lib_com/options.h
index 12a2924643a2f3740388df2358cc9ab663171f23..772fcf0fbf9709dbca32413acd1362731e85536e 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -173,6 +173,7 @@
 
 #define NON_BE_FIX_1137_GSC_IVAS_FXFLT_DECODING               /* VA: Add fix point bit allocation for special GSC mode such that float and fixed point have the same final bit allocation */
 #define NONBE_FIX_1132_THRESHOLD_POW_IN_SWB_TBE               /* VA: issue 1132: prevent division by extremely low energy value in SWB TBE */
+#define NONBE_FIX_1134_FASTCONV_MC_LOUDNESS                   /* FhG: issue 1134: fix output loudness for multichannel binaural rendering with FastConv */
 
 /* ##################### End NON-BE switches ########################### */
 
diff --git a/lib_dec/ivas_binRenderer_internal.c b/lib_dec/ivas_binRenderer_internal.c
index f4e3e39fddddbb7128e7fdc1b4c5f7a7e2ba6db1..45496d61c7d192fa1675710ac71a04972411578f 100644
--- a/lib_dec/ivas_binRenderer_internal.c
+++ b/lib_dec/ivas_binRenderer_internal.c
@@ -76,9 +76,20 @@ static void ivas_binRenderer_filterModule(
 )
 {
     int16_t bandIdx, k, chIdx, tapIdx;
+#ifdef NONBE_FIX_1134_FASTCONV_MC_LOUDNESS
+    float gain;
+#endif
     float *filterStatesLeftRealPtr, *filterStatesLeftImagPtr;
     const float *filterTapsLeftRealPtr, *filterTapsLeftImagPtr, *filterTapsRightRealPtr, *filterTapsRightImagPtr;
 
+#ifdef NONBE_FIX_1134_FASTCONV_MC_LOUDNESS
+    gain = 1.f;
+
+    if ( hBinRenderer->ivas_format == MC_FORMAT )
+    {
+        gain = 1.f / sqrtf( hBinRenderer->nInChannels );
+    }
+#endif
     for ( bandIdx = 0; bandIdx < hBinRenderer->conv_band; bandIdx++ )
     {
         for ( chIdx = 0; chIdx < hBinRenderer->nInChannels; chIdx++ )
@@ -120,10 +131,22 @@ static void ivas_binRenderer_filterModule(
                 /* Right Real and Imag */
                 out_Conv_CLDFB_real[1][k][bandIdx] += outRealRight + ( filterStatesLeftRealPtr[0] * filterTapsRightRealPtr[0] ) - ( filterStatesLeftImagPtr[0] * filterTapsRightImagPtr[0] );
                 out_Conv_CLDFB_imag[1][k][bandIdx] += outImagRight + ( filterStatesLeftRealPtr[0] * filterTapsRightImagPtr[0] ) + ( filterStatesLeftImagPtr[0] * filterTapsRightRealPtr[0] );
+#ifdef NONBE_FIX_1134_FASTCONV_MC_LOUDNESS
+
+                if ( hBinRenderer->ivas_format == MC_FORMAT )
+                {
+                    /* equalization gain for multichannel */
+                    out_Conv_CLDFB_real[0][k][bandIdx] *= gain;
+                    out_Conv_CLDFB_imag[0][k][bandIdx] *= gain;
+                    out_Conv_CLDFB_real[1][k][bandIdx] *= gain;
+                    out_Conv_CLDFB_imag[1][k][bandIdx] *= gain;
+                }
+#endif
             }
         }
     }
 
+
     return;
 }