diff --git doc/src/sgml/plhandler.sgml doc/src/sgml/plhandler.sgml
index b82a5da..ec79c88 100644
--- doc/src/sgml/plhandler.sgml
+++ doc/src/sgml/plhandler.sgml
@@ -110,6 +110,17 @@
 PG_MODULE_MAGIC;
 #endif
 
+/*
+* _PG_init()                   - library load-time initialization
+*
+* DO NOT make this static nor change its name!
+*/
+void
+_PG_init(void)
+{
+
+}
+
 PG_FUNCTION_INFO_V1(plsample_call_handler);
 
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