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-rw-r--r--src/include/access/xlog.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/include/access/xlog.h b/src/include/access/xlog.h
index e302bd102cd..5e1e3446aed 100644
--- a/src/include/access/xlog.h
+++ b/src/include/access/xlog.h
@@ -31,7 +31,7 @@ extern XLogRecPtr XactLastRecEnd;
extern PGDLLIMPORT XLogRecPtr XactLastCommitEnd;
/* these variables are GUC parameters related to XLOG */
-extern int wal_segment_size;
+extern PGDLLIMPORT int wal_segment_size;
extern int min_wal_size_mb;
extern int max_wal_size_mb;
extern int wal_keep_size_mb;