diff --git a/c/src/libchip/rtc/icm7170_reg.c b/c/src/libchip/rtc/icm7170_reg.c
index 378dd7a261..975b591f82 100644
--- a/c/src/libchip/rtc/icm7170_reg.c
+++ b/c/src/libchip/rtc/icm7170_reg.c
@@ -14,6 +14,8 @@
  */
 
 #include <rtems.h>
+#include <libchip/rtc.h>
+#include <libchip/icm7170.h>
 
 #ifndef _ICM7170_MULTIPLIER
 #define _ICM7170_MULTIPLIER 1
diff --git a/c/src/libchip/rtc/m48t08_reg.c b/c/src/libchip/rtc/m48t08_reg.c
index 42d45d717c..828c03a480 100644
--- a/c/src/libchip/rtc/m48t08_reg.c
+++ b/c/src/libchip/rtc/m48t08_reg.c
@@ -14,6 +14,8 @@
  */
 
 #include <rtems.h>
+#include <libchip/rtc.h>
+#include <libchip/m48t08.h>
 
 #ifndef _M48T08_MULTIPLIER
 #define _M48T08_MULTIPLIER 1
diff --git a/c/src/libchip/rtc/mc146818a.c b/c/src/libchip/rtc/mc146818a.c
index 4b8bf6abb2..1540d94ee5 100644
--- a/c/src/libchip/rtc/mc146818a.c
+++ b/c/src/libchip/rtc/mc146818a.c
@@ -52,7 +52,7 @@ bool mc146818a_probe(
 /*
  * Initialize chip
  */
-void mc146818a_initialize(
+static void mc146818a_initialize(
   int minor
 )
 {
@@ -69,7 +69,7 @@ void mc146818a_initialize(
 /*
  * Read time from chip
  */
-int mc146818a_get_time(
+static int mc146818a_get_time(
   int                minor,
   rtems_time_of_day *time
 )
@@ -129,7 +129,7 @@ int mc146818a_get_time(
 /*
  * Set time into chip
  */
-int mc146818a_set_time(
+static int mc146818a_set_time(
   int                      minor,
   const rtems_time_of_day *time
 )