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-rw-r--r--src/backend/access/transam/transam.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backend/access/transam/transam.c b/src/backend/access/transam/transam.c
index 3cc0096d92a..b92a27bff36 100644
--- a/src/backend/access/transam/transam.c
+++ b/src/backend/access/transam/transam.c
@@ -301,7 +301,7 @@ TransactionIdPrecedes(TransactionId id1, TransactionId id2)
{
/*
* If either ID is a permanent XID then we can just do unsigned
- * comparison. If both are normal, do a modulo-2^31 comparison.
+ * comparison. If both are normal, do a modulo-2^32 comparison.
*/
int32 diff;