diff --git a/contrib/hstore/hstore.h b/contrib/hstore/hstore.h
index 6303fa4061..6bab08b7de 100644
--- a/contrib/hstore/hstore.h
+++ b/contrib/hstore/hstore.h
@@ -194,7 +194,7 @@ extern Pairs *hstoreArrayToPairs(ArrayType *a, int *npairs);
 #if HSTORE_POLLUTE_NAMESPACE
 #define HSTORE_POLLUTE(newname_,oldname_) \
 	PG_FUNCTION_INFO_V1(oldname_);		  \
-	extern PGDLLEXPORT Datum newname_(PG_FUNCTION_ARGS); \
+	Datum newname_(PG_FUNCTION_ARGS);	  \
 	Datum oldname_(PG_FUNCTION_ARGS) { return newname_(fcinfo); } \
 	extern int no_such_variable
 #else
diff --git a/contrib/ltree/ltree.h b/contrib/ltree/ltree.h
index c7aa7f8818..c604357dbf 100644
--- a/contrib/ltree/ltree.h
+++ b/contrib/ltree/ltree.h
@@ -130,30 +130,30 @@ typedef struct
 
 
 /* use in array iterator */
-extern PGDLLEXPORT Datum ltree_isparent(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum ltree_risparent(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum ltq_regex(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum ltq_rregex(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum lt_q_regex(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum lt_q_rregex(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum ltxtq_exec(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum ltxtq_rexec(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum _ltq_regex(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum _ltq_rregex(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum _lt_q_regex(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum _lt_q_rregex(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum _ltxtq_exec(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum _ltxtq_rexec(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum _ltree_isparent(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum _ltree_risparent(PG_FUNCTION_ARGS);
+Datum		ltree_isparent(PG_FUNCTION_ARGS);
+Datum		ltree_risparent(PG_FUNCTION_ARGS);
+Datum		ltq_regex(PG_FUNCTION_ARGS);
+Datum		ltq_rregex(PG_FUNCTION_ARGS);
+Datum		lt_q_regex(PG_FUNCTION_ARGS);
+Datum		lt_q_rregex(PG_FUNCTION_ARGS);
+Datum		ltxtq_exec(PG_FUNCTION_ARGS);
+Datum		ltxtq_rexec(PG_FUNCTION_ARGS);
+Datum		_ltq_regex(PG_FUNCTION_ARGS);
+Datum		_ltq_rregex(PG_FUNCTION_ARGS);
+Datum		_lt_q_regex(PG_FUNCTION_ARGS);
+Datum		_lt_q_rregex(PG_FUNCTION_ARGS);
+Datum		_ltxtq_exec(PG_FUNCTION_ARGS);
+Datum		_ltxtq_rexec(PG_FUNCTION_ARGS);
+Datum		_ltree_isparent(PG_FUNCTION_ARGS);
+Datum		_ltree_risparent(PG_FUNCTION_ARGS);
 
 /* Concatenation functions */
-extern PGDLLEXPORT Datum ltree_addltree(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum ltree_addtext(PG_FUNCTION_ARGS);
-extern PGDLLEXPORT Datum ltree_textadd(PG_FUNCTION_ARGS);
+Datum		ltree_addltree(PG_FUNCTION_ARGS);
+Datum		ltree_addtext(PG_FUNCTION_ARGS);
+Datum		ltree_textadd(PG_FUNCTION_ARGS);
 
 /* Util function */
-extern PGDLLEXPORT Datum ltree_in(PG_FUNCTION_ARGS);
+Datum		ltree_in(PG_FUNCTION_ARGS);
 
 bool ltree_execute(ITEM *curitem, void *checkval,
 			  bool calcnot, bool (*chkcond) (void *checkval, ITEM *val));
diff --git a/doc/src/sgml/xfunc.sgml b/doc/src/sgml/xfunc.sgml
index 6060e61857..de6a466efc 100644
--- a/doc/src/sgml/xfunc.sgml
+++ b/doc/src/sgml/xfunc.sgml
@@ -2577,23 +2577,6 @@ concat_text(PG_FUNCTION_ARGS)
         error messages to this effect.
        </para>
       </listitem>
-
-      <listitem>
-       <para>
-        To work correctly on Windows, <literal>C</>-language functions need
-        to be marked with <literal>PGDLLEXPORT</>, unless you use a build
-        process that marks all global functions that way.  In simple cases
-        this detail will be handled transparently by
-        the <literal>PG_FUNCTION_INFO_V1</> macro.  However, if you write
-        explicit external declarations (perhaps in header files), be sure
-        to write them like this:
-<programlisting>
-extern PGDLLEXPORT Datum funcname(PG_FUNCTION_ARGS);
-</programlisting>
-        or you'll get compiler complaints when building on Windows.  (On
-        other platforms, the <literal>PGDLLEXPORT</> macro does nothing.)
-       </para>
-      </listitem>
      </itemizedlist>
     </para>
    </sect2>
diff --git a/src/include/fmgr.h b/src/include/fmgr.h
index 3668ac3f6e..0878418516 100644
--- a/src/include/fmgr.h
+++ b/src/include/fmgr.h
@@ -350,11 +350,12 @@ typedef const Pg_finfo_record *(*PGFInfoFunction) (void);
  *
  *	On Windows, the function and info function must be exported.  Our normal
  *	build processes take care of that via .DEF files or --export-all-symbols.
- *	Module authors using a different build process might do it differently,
- *	so we declare these functions PGDLLEXPORT for their convenience.
+ *	Module authors using a different build process might need to manually
+ *	declare the function PGDLLEXPORT.  We do that automatically here for the
+ *	info function, since authors shouldn't need to be explicitly aware of it.
  */
 #define PG_FUNCTION_INFO_V1(funcname) \
-extern PGDLLEXPORT Datum funcname(PG_FUNCTION_ARGS); \
+extern Datum funcname(PG_FUNCTION_ARGS); \
 extern PGDLLEXPORT const Pg_finfo_record * CppConcat(pg_finfo_,funcname)(void); \
 const Pg_finfo_record * \
 CppConcat(pg_finfo_,funcname) (void) \