diff --git a/src/_wrappers.c b/src/_wrappers.c
index 17461a4..ccfe9fb 100644
--- a/src/_wrappers.c
+++ b/src/_wrappers.c
@@ -1306,7 +1306,7 @@ static PyObject *WraptFunctionWrapper_call(
 
     PyObject *result = NULL;
 
-    int len = 0;
+    Py_ssize_t len = 0;
     int i = 0;
 
     if (!kwds) {
@@ -1604,7 +1604,7 @@ static PyObject *WraptBoundFunctionWrapper_call(
 
     PyObject *result = NULL;
 
-    int len = 0;
+    Py_ssize_t len = 0;
     int i = 0;
 
     if (!kwds) {
@@ -1879,7 +1879,7 @@ static PyObject *WraptBoundMethodWrapper_call(
 
     PyObject *result = NULL;
 
-    int len = 0;
+    Py_ssize_t len = 0;
     int i = 0;
 
     if (self->instance == Py_None) {