diff --git a/libc/stdio/lib_printf.c b/libc/stdio/lib_printf.c
index b035aa14f9a..178cf9c653d 100644
--- a/libc/stdio/lib_printf.c
+++ b/libc/stdio/lib_printf.c
@@ -42,6 +42,8 @@
  ****************************************************************************/
 
 #include <stdio.h>
+#include <syslog.h>
+
 #include "lib_internal.h"
 
 /****************************************************************************
diff --git a/sched/sig_internal.h b/sched/sig_internal.h
index 178ff54b9c6..e9a432092cd 100644
--- a/sched/sig_internal.h
+++ b/sched/sig_internal.h
@@ -155,6 +155,9 @@ extern sq_queue_t  g_sigpendingirqsignal;
  ****************************************************************************/
 
 /* Internal signal-related interfaces ***************************************/
+/* Forward references */
+
+struct task_group_s;
 
 /* sig_intialize.c */