diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c
index 95d42d6dc5e5ac..9afb79fe2ce052 100644
--- a/Modules/mmapmodule.c
+++ b/Modules/mmapmodule.c
@@ -1067,7 +1067,7 @@ new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict)
         return NULL;
     if (map_size < 0) {
         PyErr_SetString(PyExc_OverflowError,
-                        "memory mapped length must be postiive");
+                        "memory mapped length must be positive");
         return NULL;
     }
     if (offset < 0) {
@@ -1253,7 +1253,7 @@ new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict)
 
     if (map_size < 0) {
         PyErr_SetString(PyExc_OverflowError,
-                        "memory mapped length must be postiive");
+                        "memory mapped length must be positive");
         return NULL;
     }
     if (offset < 0) {