diff --git a/path.c b/path.c
index 13858fb63..53139c5df 100644
--- a/path.c
+++ b/path.c
@@ -50,7 +50,7 @@ typedef struct {
 static PyTypeObject PyPathType;
 
 static double*
-alloc_array(int count)
+alloc_array(Py_ssize_t count)
 {
     double* xy;
     if (count < 0) {