diff --git a/lib_com/ifft_rel.c b/lib_com/ifft_rel.c
index fc267a7a10bc80c9cfc5ed856e472959aa780f7c..44272ceccebed9db7a6a073ba195ff0c1764fad2 100644
--- a/lib_com/ifft_rel.c
+++ b/lib_com/ifft_rel.c
@@ -229,7 +229,11 @@ void ifft_rel(
      *-----------------------------------------------------------------*/
 
     idx = fft256_read_indexes;
+#ifdef FIX_622_SILENCE_USAN_WARNING
+    xi0 = &temp[0] - 1;
+#else
     xi0 = temp - 1;
+#endif
     if ( n == 128 )
     {
         for ( i = 0; i < n; i++ )
diff --git a/lib_com/options.h b/lib_com/options.h
index b02e63cd1ee4d0fa841168a6d68b7105c309e1fb..15db8559fbe8de611d7cc7562633d1c08befbe94 100755
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -194,6 +194,8 @@
 
 #define SPLIT_REND_WITH_HEAD_ROT                        /* Dlb,FhG: Split Rendering contributions 21 and 35 */
 
+#define FIX_622_SILENCE_USAN_WARNING                    /* FhG: silenceusan warning in ifft code */
+
 /* ################## End BE DEVELOPMENT switches ######################### */