diff --git a/uvloop/includes/stdlib.pxi b/uvloop/includes/stdlib.pxi
index 02605a08..5fff4ad8 100644
--- a/uvloop/includes/stdlib.pxi
+++ b/uvloop/includes/stdlib.pxi
@@ -37,7 +37,6 @@ cdef aio_wait = asyncio.wait
 cdef aio_wrap_future = asyncio.wrap_future
 cdef aio_logger = asyncio.log.logger
 cdef aio_iscoroutine = asyncio.iscoroutine
-cdef aio_iscoroutinefunction = asyncio.iscoroutinefunction
 cdef aio_BaseProtocol = asyncio.BaseProtocol
 cdef aio_Protocol = asyncio.Protocol
 cdef aio_isfuture = getattr(asyncio, 'isfuture', None)
@@ -65,6 +64,7 @@ cdef gc_disable = gc.disable
 
 cdef iter_chain = itertools.chain
 cdef inspect_isgenerator = inspect.isgenerator
+cdef inspect_iscoroutinefunction = inspect.iscoroutinefunction
 
 cdef int has_IPV6_V6ONLY = hasattr(socket, 'IPV6_V6ONLY')
 cdef int IPV6_V6ONLY = getattr(socket, 'IPV6_V6ONLY', -1)
diff --git a/uvloop/loop.pyx b/uvloop/loop.pyx
index 2ed1f272..28701f22 100644
--- a/uvloop/loop.pyx
+++ b/uvloop/loop.pyx
@@ -2731,7 +2731,7 @@ cdef class Loop:
             return transport, protocol
 
     def run_in_executor(self, executor, func, *args):
-        if aio_iscoroutine(func) or aio_iscoroutinefunction(func):
+        if aio_iscoroutine(func) or inspect_iscoroutinefunction(func):
             raise TypeError("coroutines cannot be used with run_in_executor()")
 
         self._check_closed()
@@ -2910,7 +2910,7 @@ cdef class Loop:
                 'the main thread')
 
         if (aio_iscoroutine(callback)
-                or aio_iscoroutinefunction(callback)):
+                or inspect_iscoroutinefunction(callback)):
             raise TypeError(
                 "coroutines cannot be used with add_signal_handler()")