diff --git a/free.c b/free.c
index d5f879c..6f3494d 100644
--- a/free.c
+++ b/free.c
@@ -24,7 +24,8 @@ main(int argc, char *argv[])
 {
 	struct sysinfo info;
 
-	sysinfo(&info);
+	if (sysinfo(&info) < 0)
+		eprintf("sysinfo:");
 	mem_unit = info.mem_unit ? info.mem_unit : 1;
 
 	ARGBEGIN {
diff --git a/ps.c b/ps.c
index 2a911a9..f6b011e 100644
--- a/ps.c
+++ b/ps.c
@@ -122,7 +122,8 @@ psout(struct procstat *ps)
 		if (errno || !pw)
 			eprintf("getpwuid %d:", puid);
 
-		sysinfo(&info);
+		if (sysinfo(&info) < 0)
+			eprintf("sysinfo:");
 		start = time(NULL) - info.uptime;
 		start += (ps->starttime / sysconf(_SC_CLK_TCK));
 		tm = localtime(&start);
diff --git a/uptime.c b/uptime.c
index d5196e3..0a3987f 100644
--- a/uptime.c
+++ b/uptime.c
@@ -29,7 +29,8 @@ main(int argc, char *argv[])
 		usage();
 	} ARGEND;
 
-	sysinfo(&info);
+	if (sysinfo(&info) < 0)
+		eprintf("sysinfo:");
 	time(&tmptime);
 	now = localtime(&tmptime);
 	printf(" %02d:%02d:%02d up ", now->tm_hour, now->tm_min, now->tm_sec);