PL/1 - Negative Zero

We are facing problem when migrating to Enterprise PL/1. Do you have any migration rule book?

DCL IN_FLD PIC’(6)9’;
DCL IN_SIGN CHAR(1);
DCL OUT_FLD FIXED DEC(7);

OUT_FLD = IN_FLD;
IF IN_SIGN = ‘-‘ THEN
DO;
OUT_FLD = OUT_FLD*(-1);
END;

In Case IN_FLD is 0 ( Zero) with IN_SIGN = ‘-‘, the OUT_FLD is having result as 0 (Zero) with Enterprise Compiler. With Old Compiler, Results are -0 or X(0C) . We have changed the compiler options to “FORCEDSIGN” but results are without Negative Sign. This is working fine for other Numeric Values.

Please provide your thoughts.