diff --git a/src/backend/access/transam/varsup.c b/src/backend/access/transam/varsup.c
index dd3d7498250..3ade84616a3 100644
--- a/src/backend/access/transam/varsup.c
+++ b/src/backend/access/transam/varsup.c
@@ -27,9 +27,6 @@
 #include "utils/syscache.h"
 
 
-/* Number of OIDs to prefetch (preallocate) per XLOG write */
-#define VAR_OID_PREFETCH		8192
-
 /* pointer to "variable cache" in shared memory (set up by shmem.c) */
 VariableCache ShmemVariableCache = NULL;
 
diff --git a/src/include/access/transam.h b/src/include/access/transam.h
index 45bc724ce88..9bcc7d3d91e 100644
--- a/src/include/access/transam.h
+++ b/src/include/access/transam.h
@@ -196,6 +196,9 @@ FullTransactionIdAdvance(FullTransactionId *dest)
 #define FirstUnpinnedObjectId	12000
 #define FirstNormalObjectId		16384
 
+/* Number of OIDs to prefetch (preallocate) per XLOG write */
+#define VAR_OID_PREFETCH		8192
+
 /*
  * VariableCache is a data structure in shared memory that is used to track
  * OID and XID assignment state.  For largely historical reasons, there is