diff --git a/libSBRenc/src/tran_det.cpp b/libSBRenc/src/tran_det.cpp
index 3b6765a..453a977 100644
--- a/libSBRenc/src/tran_det.cpp
+++ b/libSBRenc/src/tran_det.cpp
@@ -200,12 +200,12 @@ static FIXP_DBL spectralChange(
 
     /* Sum up energies in first half */
     for (i = start; i < border; i++) {
-      accu1 += scaleValue(Energies[i][j], -energies_e_diff[i]);
+      accu1 = fAddSaturate(accu1, scaleValue(Energies[i][j], -energies_e_diff[i]));
     }
 
     /* Sum up energies in second half */
     for (i = border; i < stop; i++) {
-      accu2 += scaleValue(Energies[i][j], -energies_e_diff[i]);
+      accu2 = fAddSaturate(accu2, scaleValue(Energies[i][j], -energies_e_diff[i]));
     }
 
     /* Ensure certain energy to prevent division by zero and to prevent