diff --git a/examples/bdev/fio_plugin/fio_plugin.c b/examples/bdev/fio_plugin/fio_plugin.c
index 424993df7..f0cfc8ad9 100644
--- a/examples/bdev/fio_plugin/fio_plugin.c
+++ b/examples/bdev/fio_plugin/fio_plugin.c
@@ -127,7 +127,7 @@ spdk_fio_bdev_init_done(void *cb_arg, int rc)
 
 static struct spdk_poller *
 spdk_fio_start_poller(void *thread_ctx,
-		      spdk_thread_fn fn,
+		      spdk_poller_fn fn,
 		      void *arg,
 		      uint64_t period_microseconds)
 {
diff --git a/include/spdk/io_channel.h b/include/spdk/io_channel.h
index 81e2402f8..60d4005e2 100644
--- a/include/spdk/io_channel.h
+++ b/include/spdk/io_channel.h
@@ -181,7 +181,7 @@ void spdk_for_each_thread(spdk_thread_fn fn, void *ctx, spdk_thread_fn cpl);
  * \return a pointer to the poller registered on the current thread on success
  * or NULL on failure.
  */
-struct spdk_poller *spdk_poller_register(spdk_thread_fn fn,
+struct spdk_poller *spdk_poller_register(spdk_poller_fn fn,
 		void *arg,
 		uint64_t period_microseconds);
 
diff --git a/lib/event/reactor.c b/lib/event/reactor.c
index b49fc1101..92b893525 100644
--- a/lib/event/reactor.c
+++ b/lib/event/reactor.c
@@ -249,7 +249,7 @@ _spdk_poller_insert_timer(struct spdk_reactor *reactor, struct spdk_poller *poll
 
 static struct spdk_poller *
 _spdk_reactor_start_poller(void *thread_ctx,
-			   spdk_thread_fn fn,
+			   spdk_poller_fn fn,
 			   void *arg,
 			   uint64_t period_microseconds)
 {
diff --git a/test/lib/ut_multithread.c b/test/lib/ut_multithread.c
index 17d89d846..724186fdb 100644
--- a/test/lib/ut_multithread.c
+++ b/test/lib/ut_multithread.c
@@ -83,7 +83,7 @@ __send_msg(spdk_thread_fn fn, void *ctx, void *thread_ctx)
 }
 
 static struct spdk_poller *
-__start_poller(void *thread_ctx, spdk_thread_fn fn, void *arg, uint64_t period_microseconds)
+__start_poller(void *thread_ctx, spdk_poller_fn fn, void *arg, uint64_t period_microseconds)
 {
 	struct ut_thread *thread = thread_ctx;
 	struct ut_poller *poller = calloc(1, sizeof(struct ut_poller));