diff --git a/lib_enc/ivas_stereo_mdct_core_enc_fx.c b/lib_enc/ivas_stereo_mdct_core_enc_fx.c
index 646f3e725c747fc6f6b56627138d8884526e094b..1bd5c936be5d9136f80a1b96d4d7e4d5e7bf9b57 100644
--- a/lib_enc/ivas_stereo_mdct_core_enc_fx.c
+++ b/lib_enc/ivas_stereo_mdct_core_enc_fx.c
@@ -371,7 +371,7 @@ void stereo_mdct_core_enc_fx(
         }
 
         exp1 = add( exp1, 1 ); /* 1 guard bit to avoid over-flows in stereo_coder_tcx_fx */
-        exp2 = add( exp2, 1 ); /* 1 guard bit to avoid over-flows in stereo_coder_tcx_fx */
+        exp2 = add( exp2, 2 ); /* 2 guard bit to avoid over-flows in stereo_coder_tcx_fx (ms_processing_fx) */
 
         FOR( ch = 0; ch < CPE_CHANNELS; ch++ )
         {