diff --git a/bin/ps/ps.c b/bin/ps/ps.c
index f507b6a..0263b64 100644
--- a/bin/ps/ps.c
+++ b/bin/ps/ps.c
@@ -890,7 +890,7 @@ add_list(struct listinfo *inf, const char *argp)
 	char elemcopy[PATH_MAX];
 
 	if (*argp == 0)
-		inf->addelem(inf, elemcopy);
+		inf->addelem(inf, "");
 	while (*argp != '\0') {
 		while (*argp != '\0' && strchr(W_SEP, *argp) != NULL)
 			argp++;