diff --git a/services/shellchat/src/cmds/trng_cmd.rs b/services/shellchat/src/cmds/trng_cmd.rs
index 42fc7b2fa..ec19ebbd6 100644
--- a/services/shellchat/src/cmds/trng_cmd.rs
+++ b/services/shellchat/src/cmds/trng_cmd.rs
@@ -34,7 +34,7 @@ impl<'a> ShellCmdApi<'a> for TrngCmd {
                     let ht = env.trng.get_health_tests().unwrap();
                     for core in 0..4 {
                         write!(ret, "RO {}: ", core).unwrap();
-                        for bin in 0..5 {
+                        for bin in 0..4 {
                             write!(ret, "{} ", ht.ro_miniruns[core].run_count[bin]).unwrap();
                         }
                         write!(ret, "\n").unwrap();