diff --git a/cudd-2.4.1.1/util/pipefork.c b/cudd-2.4.1.1/util/pipefork.c
index 1d58bac..cfd5c12 100644
--- a/cudd-2.4.1.1/util/pipefork.c
+++ b/cudd-2.4.1.1/util/pipefork.c
@@ -39,12 +39,7 @@ int util_pipefork(char **argv,		/* normal argv argument list */
     int forkpid, waitPid;
     int topipe[2], frompipe[2];
     char buffer[1024];
-
-#if (defined __hpux) || (defined __osf__) || (defined _IBMR2) || (defined __SVR4) || (defined __CYGWIN32__) || (defined __MINGW32__) 
     int status;
-#else
-    union wait status;
-#endif
 
     /* create the PIPES...
      * fildes[0] for reading from command