Fix a warning.
diff --git a/Modules/zipimport.c b/Modules/zipimport.c
index 53bc799..770f18f 100644
--- a/Modules/zipimport.c
+++ b/Modules/zipimport.c
@@ -1129,7 +1129,7 @@
 		if (Py_VerboseFlag > 1)
 			PySys_WriteStderr("# trying %s%c%s\n",
 					  _PyUnicode_AsString(self->archive),
-					  SEP, path);
+					  (int)SEP, path);
 		toc_entry = PyDict_GetItemString(self->files, path);
 		if (toc_entry != NULL) {
 			time_t mtime = 0;