--- shadow-980417/lib/defines.h~	Thu Apr 16 20:57:42 1998
+++ shadow-980417/lib/defines.h	Mon May 18 17:24:43 1998
@@ -66,7 +66,7 @@
 #else
 # define memzero(ptr, size) bzero((char *)(ptr), (size))
 #endif
-#define strzero(s) do { char *cp = (s); while(*cp) *cp++ = '\0'; } while (0)
+#define strzero(s) do { char *_cp = (s); while(*_cp) *_cp++ = '\0'; } while (0)
 
 #ifdef HAVE_DIRENT_H  /* DIR_SYSV */
 # include <dirent.h>