diff --git a/test/cbmc/proofs/OtaReceiveEvent_FreeRTOS/OtaReceiveEvent_FreeRTOS_harness.c b/test/cbmc/proofs/OtaReceiveEvent_FreeRTOS/OtaReceiveEvent_FreeRTOS_harness.c
index 7b4e5dcbd..fee5d0b41 100644
--- a/test/cbmc/proofs/OtaReceiveEvent_FreeRTOS/OtaReceiveEvent_FreeRTOS_harness.c
+++ b/test/cbmc/proofs/OtaReceiveEvent_FreeRTOS/OtaReceiveEvent_FreeRTOS_harness.c
@@ -27,11 +27,17 @@
  * @file OtaReceiveEvent_FreeRTOS_harness.c
  * @brief Implements the proof harness for OtaReceiveEvent_FreeRTOS function.
  */
-/*  FreeRTOS includes for OTA library. */
-#include "FreeRTOSConfig.h"
+
+/* LibC includes */
+#include <stdlib.h>
+
+/* Proof include */
 #include "ota_os_freertos.h"
 #include "ota_private.h"
 
+/*  FreeRTOS includes for OTA library. */
+#include "FreeRTOSConfig.h"
+
 void OtaReceiveEvent_FreeRTOS_harness()
 {
     OtaEventContext_t * pEventCtx;
diff --git a/test/cbmc/proofs/OtaStartTimer_FreeRTOS/OtaStartTimer_FreeRTOS_harness.c b/test/cbmc/proofs/OtaStartTimer_FreeRTOS/OtaStartTimer_FreeRTOS_harness.c
index d073c501a..ddc0c6ea6 100644
--- a/test/cbmc/proofs/OtaStartTimer_FreeRTOS/OtaStartTimer_FreeRTOS_harness.c
+++ b/test/cbmc/proofs/OtaStartTimer_FreeRTOS/OtaStartTimer_FreeRTOS_harness.c
@@ -27,9 +27,15 @@
  * @file OtaStartTimer_FreeRTOS_harness.c
  * @brief Implements the proof harness for OtaStartTimer_FreeRTOS function.
  */
+
+/* LibC includes */
+#include <stdlib.h>
+
+/* Proof include */
+#include "ota_os_freertos.h"
+
 /*  FreeRTOS includes for OTA library. */
 #include "FreeRTOSConfig.h"
-#include "ota_os_freertos.h"
 
 void otaCallback( OtaTimerId_t otaTimerId )
 {