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

index 06abb31..914bf5d 100644

--- a/Modules/zipimport.c

+++ b/Modules/zipimport.c

@@ -1112,6 +1112,11 @@ get_data(PyObject *archive, PyObject *toc_entry)

     }

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

+    if (data_size > LONG_MAX - 1) {

+        fclose(fp);

+        PyErr_NoMemory();

+        return NULL;

+    }

     bytes_size = compress == 0 ? data_size : data_size + 1;

     if (bytes_size == 0)

         bytes_size++;