diff --git a/include/compat/freertosthreadcompat.h b/include/compat/freertosthreadcompat.h
new file mode 100644
index 0000000000..30b3e1668d
--- /dev/null
+++ b/include/compat/freertosthreadcompat.h
@@ -0,0 +1,126 @@
+#ifndef LIBCRYPTOCOMPAT_FREERTOSTHREADCOMPAT_H
+#define LIBCRYPTOCOMPAT_FREERTOSTHREADCOMPAT_H
+
+#ifdef FREERTOS
+
+#include <sys/types.h>
+
+#include <FreeRTOS/FreeRTOSConfig.h>
+#include <FreeRTOS/FreeRTOS.h>
+#include <FreeRTOS/semphr.h>
+#include <FreeRTOS/task.h>
+
+
+// PTHREAD ONCE
+#define pthread_once libressl_pthread_once
+struct pthread_once {
+	xSemaphoreHandle lock;
+	int init_executed;
+};
+#define pthread_once_t libressl_pthread_once_t
+typedef struct pthread_once pthread_once_t;
+
+#define PTHREAD_ONCE_INIT { .lock = NULL, .init_executed = 0 }
+
+static inline int
+pthread_once(pthread_once_t *once, void (*cb) (void))
+{
+	if (once->lock == NULL)
+		once->lock = xSemaphoreCreateMutex();
+	if (once->lock == NULL)
+		return -1;
+	if (xSemaphoreTake(once->lock, portMAX_DELAY) != pdTRUE)
+		return -1;
+
+	if (!once->init_executed) {
+		once->init_executed = 1;
+		cb();
+	}
+
+	xSemaphoreGive(once->lock);
+	return 0;
+}
+
+// PTHREAD Support 
+#define pthread_t libressl_pthread_t
+typedef TaskHandle_t pthread_t;
+
+#define pthread_self libressl_pthread_self
+static inline pthread_t
+pthread_self(void)
+{
+	return xTaskGetCurrentTaskHandle();
+}
+
+#define pthread_equal libressl_pthread_equal
+static inline int
+pthread_equal(pthread_t t1, pthread_t t2)
+{
+	return t1 == t2;
+}
+
+
+// PTHREAD MUTEX Support
+#define pthread_mutex libressl_pthread_mutex
+struct pthread_mutex {
+	xSemaphoreHandle handle;
+};
+#define pthread_mutex_t libressl_pthread_mutex_t
+typedef struct pthread_mutex pthread_mutex_t;
+
+#define pthread_mutexattr libressl_pthread_mutexattr
+struct pthread_mutexattr {
+
+};
+#define pthread_mutexattr_t libressl_pthread_mutexattr_t
+typedef struct pthread_mutexattr pthread_mutexattr_t;
+
+
+#define PTHREAD_MUTEX_INITIALIZER { NULL }
+
+#define pthread_mutex_init libressl_pthread_mutex_init
+static inline int
+pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
+{
+	if ((mutex->handle = xSemaphoreCreateMutex()) == NULL)
+		return -1;
+	return 0;
+}
+
+#define pthread_mutex_lock libressl_pthread_mutex_lock
+static inline int
+pthread_mutex_lock(pthread_mutex_t *mutex)
+{
+	if (mutex->handle == NULL)
+		mutex->handle = xSemaphoreCreateMutex();
+	if (mutex->handle == NULL)
+		return -1;
+	if (xSemaphoreTake(mutex->handle, portMAX_DELAY) != pdTRUE)
+		return -1;
+	return 0;
+}
+
+#define pthread_mutex_unlock libressl_pthread_mutex_unlock
+static inline int
+pthread_mutex_unlock(pthread_mutex_t *mutex)
+{
+	if (mutex->handle == NULL)
+		return 0;
+	if (xSemaphoreGive(mutex->handle) == pdTRUE)
+		return 0;
+	return -1;
+}
+
+#define pthread_mutex_destroy libressl_pthread_mutex_destroy
+static inline int
+pthread_mutex_destroy(pthread_mutex_t *mutex)
+{
+	if (mutex->handle != NULL)
+		vQueueDelete(mutex->handle);
+	mutex->handle = NULL;
+	return 0;
+}
+
+#endif
+
+#endif
diff --git a/include/compat/pthread.h b/include/compat/pthread.h
index ed1b9dc51a..0663737eff 100644
--- a/include/compat/pthread.h
+++ b/include/compat/pthread.h
@@ -6,7 +6,9 @@
 #ifndef LIBCRYPTOCOMPAT_PTHREAD_H
 #define LIBCRYPTOCOMPAT_PTHREAD_H
 
-#ifdef _WIN32
+#if defined(FREERTOS)
+#include <freertosthreadcompat.h>
+#elif defined(_WIN32)
 
 #include <malloc.h>
 #include <stdlib.h>
diff --git a/include/compat/syslog.h b/include/compat/syslog.h
index c7a2608bdc..683a60602c 100644
--- a/include/compat/syslog.h
+++ b/include/compat/syslog.h
@@ -3,7 +3,9 @@
  * syslog.h compatibility shim
  */
 
-#ifndef _WIN32
+#if defined(_WIN32) || defined(FREERTOS)
+#define NO_SYSLOG
+#else
 #include_next <syslog.h>
 #endif
 
@@ -14,7 +16,7 @@
 
 #include <stdarg.h>
 
-#ifdef _WIN32
+#ifdef NO_SYSLOG
 #define LOG_CONS	LOG_INFO
 #define	LOG_INFO	6	/* informational */
 #define LOG_USER    (1<<3)  /* random user-level messages */
diff --git a/include/compat/unistd.h b/include/compat/unistd.h
index 63c07fc3dc..6198615b98 100644
--- a/include/compat/unistd.h
+++ b/include/compat/unistd.h
@@ -17,6 +17,10 @@ ssize_t pread(int d, void *buf, size_t nbytes, off_t offset);
 ssize_t pwrite(int d, const void *buf, size_t nbytes, off_t offset);
 #endif
 
+#elif defined(FREERTOS)
+static inline uid_t getuid(void) {
+       return 0;
+}
 #else
 
 #include <stdlib.h>