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-rw-r--r--src/bin/scripts/vacuumdb.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/bin/scripts/vacuumdb.c b/src/bin/scripts/vacuumdb.c
index 0c434c68711..2814c034d4e 100644
--- a/src/bin/scripts/vacuumdb.c
+++ b/src/bin/scripts/vacuumdb.c
@@ -10,6 +10,10 @@
*-------------------------------------------------------------------------
*/
+#ifdef WIN32
+#define FD_SETSIZE 1024 /* must set before winsock2.h is included */
+#endif
+
#include "postgres_fe.h"
#ifdef HAVE_SYS_SELECT_H