Index: sys/boot/common/interp_forth.c
===================================================================
--- sys/boot/common/interp_forth.c
+++ sys/boot/common/interp_forth.c
@@ -325,13 +325,15 @@
 	printf("Parse error!\n");
 	break;
     default:
-        /* Hopefully, all other codes filled this buffer */
-	printf("%s\n", command_errmsg);
+	if (command_errmsg != NULL) {
+	    printf("%s\n", command_errmsg);
+	    command_errmsg = NULL;
+	}
     }
     
     if (result == VM_USEREXIT)
 	panic("interpreter exit");
     setenv("interpret", bf_vm->state ? "" : "OK", 1);
 
-    return result;
+    return (result);
 }