diff --git a/ogr_fdw.c b/ogr_fdw.c
index 8a081f6..bd415b0 100644
--- a/ogr_fdw.c
+++ b/ogr_fdw.c
@@ -304,7 +304,7 @@ get_extension_nsp_oid(Oid extOid)
 
 	systable_endscan(scandesc);
 
-#if PG_VERSION_NUM < 120
+#if PG_VERSION_NUM < 120000
     heap_close(rel, AccessShareLock);
 #else
     table_close(rel, AccessShareLock);