diff --git a/platform/hermit/syscall.h b/platform/hermit/syscall.h
index 53c11bc..05ac045 100644
--- a/platform/hermit/syscall.h
+++ b/platform/hermit/syscall.h
@@ -115,7 +115,7 @@ int sys_recmutex_lock(HermitRecursiveMutex* recmutex);
 int sys_recmutex_unlock(HermitRecursiveMutex* recmutex);
 int sys_sem_init(HermitSemaphore** sem, unsigned int pshared, unsigned int value);
 int sys_sem_destroy(HermitSemaphore* sem);
-int32_t sys_sem_post(HermitSemaphore* sem);
+int sys_sem_post(HermitSemaphore* sem);
 int sys_sem_trywait(HermitSemaphore* sem);
 int sys_sem_timedwait(HermitSemaphore *sem, unsigned int ms);
 #define sys_sem_wait(sem)	sys_sem_timedwait(sem, 0)