diff -up sysstat-8.0.4/common.c.pom sysstat-8.0.4/common.c
--- sysstat-8.0.4/common.c.pom	2008-01-01 10:26:31.000000000 +0100
+++ sysstat-8.0.4/common.c	2008-04-23 10:23:46.000000000 +0200
@@ -129,6 +129,9 @@ int get_sys_cpu_nr(void)
    while ((drd = readdir(dir)) != NULL) {
 
       if (!strncmp(drd->d_name, "cpu", 3)) {
+	 /* filter out entries like cpuidle/ */
+	 if (!isdigit(drd->d_name[3]))
+	    continue;
 	 snprintf(line, MAX_PF_NAME, "%s/%s", SYSFS_DEVCPU, drd->d_name);
 	 line[MAX_PF_NAME - 1] = '\0';
 	 if (stat(line, &buf) < 0)