diff --git a/src/include/postgres.h b/src/include/postgres.h
index a7a6584e762..046ba678faf 100644
--- a/src/include/postgres.h
+++ b/src/include/postgres.h
@@ -134,16 +134,6 @@ CharGetDatum(char X)
 	return (Datum) X;
 }
 
-/*
- * Int8GetDatum
- *		Returns datum representation for an 8-bit integer.
- */
-static inline Datum
-Int8GetDatum(int8 X)
-{
-	return (Datum) X;
-}
-
 /*
  * DatumGetUInt8
  *		Returns 8-bit unsigned integer value of a datum.