diff --git a/lib_com/basop32.c b/lib_com/basop32.c
index 20dbe663e6f5379f61062595a096af00c50480dc..fbe08a11f74d5a2afd466d351a5652b35d13f275 100644
--- a/lib_com/basop32.c
+++ b/lib_com/basop32.c
@@ -1575,7 +1575,7 @@ Word32 L_msuNs_co( Word32 L_var3, Word16 var1, Word16 var2, Flag *Carry, Flag *O
 {
     Word32 L_var_out;
 
-    L_var_out = L_mult( var1, var2 );
+    L_var_out = L_mult_o( var1, var2, Overflow );
     L_var_out = L_sub_co( L_var3, L_var_out, Carry, Overflow );
 
     return ( L_var_out );
@@ -2038,6 +2038,7 @@ Word32 DEPR_L_sub_c( Word32 L_var1, Word32 L_var2, Flag *Carry )
 
     return ( L_var_out );
 }
+
 Word32 L_sub_co( Word32 L_var1, Word32 L_var2, Flag *Carry, Flag *Overflow )
 {
     Word32 L_var_out;
@@ -2056,6 +2057,7 @@ Word32 L_sub_co( Word32 L_var1, Word32 L_var2, Flag *Carry, Flag *Overflow )
             L_var_out = L_var1 - L_var2;
             if ( L_var1 > 0L )
             {
+                set_overflow( Overflow );
                 unset_carry( Carry );
             }
         }
@@ -2067,18 +2069,22 @@ Word32 L_sub_co( Word32 L_var1, Word32 L_var2, Flag *Carry, Flag *Overflow )
 
         if ( ( L_test < 0 ) && ( L_var1 > 0 ) && ( L_var2 < 0 ) )
         {
+            set_overflow( Overflow );
             carry_int = 0;
         }
         else if ( ( L_test > 0 ) && ( L_var1 < 0 ) && ( L_var2 > 0 ) )
         {
+            set_overflow( Overflow );
             carry_int = 1;
         }
         else if ( ( L_test > 0 ) && ( ( L_var1 ^ L_var2 ) > 0 ) )
         {
+            unset_overflow( Overflow );
             carry_int = 1;
         }
         if ( L_test == MIN_32 )
         {
+            set_overflow( Overflow );
             carry_int ? set_carry( Carry ) : unset_carry( Carry );
         }
         else