diff --git a/include/sys/syscall_lookup.h b/include/sys/syscall_lookup.h
index 8bdca9d370..18438e195f 100644
--- a/include/sys/syscall_lookup.h
+++ b/include/sys/syscall_lookup.h
@@ -88,6 +88,11 @@ SYSCALL_LOOKUP(nxsem_wait,                 1)
   SYSCALL_LOOKUP(nxsem_set_protocol,       2)
 #endif
 
+#ifdef CONFIG_PRIORITY_PROTECT
+  SYSCALL_LOOKUP(nxsem_setprioceiling,     3)
+  SYSCALL_LOOKUP(nxsem_getprioceiling,     2)
+#endif
+
 /* Named semaphores */
 
 #ifdef CONFIG_FS_NAMED_SEMAPHORES
diff --git a/libs/libc/semaphore/CMakeLists.txt b/libs/libc/semaphore/CMakeLists.txt
index 970eac72a3..f544ca82d0 100644
--- a/libs/libc/semaphore/CMakeLists.txt
+++ b/libs/libc/semaphore/CMakeLists.txt
@@ -37,7 +37,7 @@ if(CONFIG_FS_NAMED_SEMAPHORES)
 endif()
 
 if(CONFIG_PRIORITY_PROTECT)
-  list(APPEND CSRCS sem_getprioceiling.c sem_setprioceiling.c)
+  list(APPEND SRCS sem_getprioceiling.c sem_setprioceiling.c)
 endif()
 
 target_sources(c PRIVATE ${SRCS})
diff --git a/syscall/syscall.csv b/syscall/syscall.csv
index 9c307835b3..c3e81430b2 100644
--- a/syscall/syscall.csv
+++ b/syscall/syscall.csv
@@ -88,9 +88,11 @@
 "nxsem_clockwait","nuttx/semaphore.h","","int","FAR sem_t *","clockid_t","FAR const struct timespec *"
 "nxsem_close","nuttx/semaphore.h","defined(CONFIG_FS_NAMED_SEMAPHORES)","int","FAR sem_t *"
 "nxsem_destroy","nuttx/semaphore.h","","int","FAR sem_t *"
+"nxsem_getprioceiling","nuttx/semaphore.h","defined(CONFIG_PRIORITY_PROTECT)","int","FAR const sem_t *","FAR int *"
 "nxsem_open","nuttx/semaphore.h","defined(CONFIG_FS_NAMED_SEMAPHORES)","int","FAR sem_t **","FAR const char *","int","...","mode_t","unsigned int"
 "nxsem_post","nuttx/semaphore.h","","int","FAR sem_t *"
 "nxsem_set_protocol","nuttx/semaphore.h","defined(CONFIG_PRIORITY_INHERITANCE)","int","FAR sem_t *","int"
+"nxsem_setprioceiling","nuttx/semaphore.h","defined(CONFIG_PRIORITY_PROTECT)","int","FAR sem_t *","int","FAR int *"
 "nxsem_timedwait","nuttx/semaphore.h","","int","FAR sem_t *","FAR const struct timespec *"
 "nxsem_trywait","nuttx/semaphore.h","","int","FAR sem_t *"
 "nxsem_unlink","nuttx/semaphore.h","defined(CONFIG_FS_NAMED_SEMAPHORES)","int","FAR const char *"