Index: subversion/libsvn_subr/win32_crashrpt.c
===================================================================
--- subversion/libsvn_subr/win32_crashrpt.c	(revision 27901)
+++ subversion/libsvn_subr/win32_crashrpt.c	(working copy)
@@ -20,6 +20,9 @@
 #ifdef SVN_USE_WIN32_CRASHHANDLER
 
 /*** Includes. ***/
+#ifdef APR_HAVE_IPV6
+#include <winsock2.h>
+#endif
 #include <windows.h>
 #include <dbghelp.h>
 #include <stdio.h>