longstanding mingw warning

Why do we get this warning on Mingw?:
   x86_64-w64-mingw32-gcc -O2 -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels
-Wformat-security-fno-strict-aliasing -fwrapv -g -I../../../../src/include
-I/home/pgrunner/bf/root/HEAD/pgsql.3896/../pgsql/src/include-I../pgsql/src/include/port/win32 -DEXEC_BACKEND
-I/c/prog/mingwdep/include"-I/home/pgrunner/bf/root/HEAD/pgsql.3896/../pgsql/src/include/port/win32" -DBUILDING_DLL  -c
-omingwcompat.o /home/pgrunner/bf/root/HEAD/pgsql.3896/../pgsql/src/backend/port/win32/mingwcompat.c
c:/mingw/msys/1.0/home/pgrunner/bf/root/HEAD/pgsql.3896/../pgsql/src/backend/port/win32/mingwcompat.c:60:1:warning:
'RegisterWaitForSingleObject'redeclared without dllimport attribute: previous dllimport ignored
 


Can we get rid of it?

cheers

andrew