diff --git a/sys/boot/common/interp.c b/sys/boot/common/interp.c
index d53a7ee5b70e..7ebab61efd92 100644
--- a/sys/boot/common/interp.c
+++ b/sys/boot/common/interp.c
@@ -118,7 +118,7 @@ interact(void)
     if (getenv("prompt") == NULL)
 	setenv("prompt", "${interpret}", 1);
     if (getenv("interpret") == NULL)
-        setenv("interpret", "ok", 1);
+        setenv("interpret", "OK", 1);
     
 
     for (;;) {
diff --git a/sys/boot/common/interp_forth.c b/sys/boot/common/interp_forth.c
index a77fb6cda9f4..b4604d91ff42 100644
--- a/sys/boot/common/interp_forth.c
+++ b/sys/boot/common/interp_forth.c
@@ -299,7 +299,7 @@ bf_run(char *line)
     
     if (result == VM_USEREXIT)
 	panic("interpreter exit");
-    setenv("interpret", bf_vm->state ? "" : "ok", 1);
+    setenv("interpret", bf_vm->state ? "" : "OK", 1);
 
     return result;
 }