diff --git a/Modules/zipimport.c b/Modules/zipimport.c

index 7240cb4..a139a3f 100644

--- a/Modules/zipimport.c

+++ b/Modules/zipimport.c

@@ -895,6 +895,11 @@ get_data(char *archive, PyObject *toc_entry)

         PyMarshal_ReadShortFromFile(fp);        /* local header size */

     file_offset += l;           /* Start of file data */

+    if (data_size > LONG_MAX - 1) {

+        fclose(fp);

+        PyErr_NoMemory();

+        return NULL;

+    }

     raw_data = PyString_FromStringAndSize((char *)NULL, compress == 0 ?

                                           data_size : data_size + 1);

     if (raw_data == NULL) {