diff --git a/bin/ps/ps.c b/bin/ps/ps.c
index 3439ca7213c0..fb5f92dc7083 100644
--- a/bin/ps/ps.c
+++ b/bin/ps/ps.c
@@ -157,7 +157,7 @@ static char vfmt[] = "pid,state,time,sl,re,pagein,vsz,rss,lim,tsiz,"
 			"%cpu,%mem,command";
 static char Zfmt[] = "label";
 
-#define	PS_ARGS	"AaCc" OPT_LAZY_f "G:gHhjLlM:mN:O:o:p:rSTt:U:uvwXxZ"
+#define	PS_ARGS	"AaCce" OPT_LAZY_f "G:gHhjLlM:mN:O:o:p:rSTt:U:uvwXxZ"
 
 int
 main(int argc, char *argv[])