3 files changed, 4 insertions, 11 deletions
diff --git a/src/include/c.h b/src/include/c.h
index 91e5baa969..947bd98067 100644
--- a/src/include/c.h
+++ b/src/include/c.h
@@ -340,10 +340,11 @@ typedef unsigned PG_INT128_TYPE uint128;
 #define PG_INT64_MAX	INT64CONST(0x7FFFFFFFFFFFFFFF)
 #define PG_UINT64_MAX	UINT64CONST(0xFFFFFFFFFFFFFFFF)
 
-/* Select timestamp representation (float8 or int64) */
-#ifdef USE_INTEGER_DATETIMES
+/*
+ * We now always use int64 timestamps, but keep this symbol defined for the
+ * benefit of external code that might test it.
+ */
 #define HAVE_INT64_TIMESTAMP
-#endif
 
 /*
  * Size
diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in
index b9dfdd41c1..8dd73f1d91 100644
--- a/src/include/pg_config.h.in
+++ b/src/include/pg_config.h.in
@@ -831,10 +831,6 @@
    (--enable-float8-byval) */
 #undef USE_FLOAT8_BYVAL
 
-/* Define to 1 if you want 64-bit integer timestamp and interval support.
-   (--enable-integer-datetimes) */
-#undef USE_INTEGER_DATETIMES
-
 /* Define to 1 to build with LDAP support. (--with-ldap) */
 #undef USE_LDAP
 
diff --git a/src/include/pg_config.h.win32 b/src/include/pg_config.h.win32
index 199668c187..fd1af59839 100644
--- a/src/include/pg_config.h.win32
+++ b/src/include/pg_config.h.win32
@@ -625,10 +625,6 @@
 /* Define to use /dev/urandom for random number generation */
 /* #undef USE_DEV_URANDOM */
 
-/* Define to 1 if you want 64-bit integer timestamp and interval support.
-   (--enable-integer-datetimes) */
-/* #undef USE_INTEGER_DATETIMES */
-
 /* Define to 1 to build with LDAP support. (--with-ldap) */
 /* #undef USE_LDAP */