diff --git a/src/decode.c b/src/decode.c
index 91bfabf34..cb018a4e7 100644
--- a/src/decode.c
+++ b/src/decode.c
@@ -235,7 +235,7 @@ _setfd(ImagingDecoderObject *decoder, PyObject *args) {
 }
 
 static PyObject *
-_get_pulls_fd(ImagingDecoderObject *decoder) {
+_get_pulls_fd(ImagingDecoderObject *decoder, void *closure) {
     return PyBool_FromLong(decoder->pulls_fd);
 }
 
diff --git a/src/encode.c b/src/encode.c
index 5933e79a5..2ecf9723b 100644
--- a/src/encode.c
+++ b/src/encode.c
@@ -299,7 +299,7 @@ _setfd(ImagingEncoderObject *encoder, PyObject *args) {
 }
 
 static PyObject *
-_get_pushes_fd(ImagingEncoderObject *encoder) {
+_get_pushes_fd(ImagingEncoderObject *encoder, void *closure) {
     return PyBool_FromLong(encoder->pushes_fd);
 }