diff --git a/sql/functions.sql b/sql/functions.sql
index 1883d998..f219e70e 100644
--- a/sql/functions.sql
+++ b/sql/functions.sql
@@ -895,7 +895,7 @@ BEGIN
                 insert into placex (osm_type, osm_id, class, type, admin_level, housenumber, street, addr_place, isin, postcode,
                   country_code, parent_place_id, rank_address, rank_search, indexed_status, geometry)
                   values ('N',prevnode.osm_id, 'place', 'house', prevnode.admin_level, housenum, prevnode.street, prevnode.addr_place, prevnode.isin, coalesce(prevnode.postcode, defpostalcode),
-                  prevnode.country_code, prevnode.parent_place_id, prevnode.rank_address, prevnode.rank_search, 1, ST_Line_Interpolate_Point(linegeo, (housenum::float-orginalstartnumber::float)/originalnumberrange::float));
+                  prevnode.country_code, prevnode.parent_place_id, prevnode.rank_address, prevnode.rank_search, 1, ST_LineInterpolatePoint(linegeo, (housenum::float-orginalstartnumber::float)/originalnumberrange::float));
                 newpoints := newpoints + 1;
 --RAISE WARNING 'interpolation number % % ',prevnode.place_id,housenum;
               END LOOP;
@@ -1484,9 +1484,9 @@ BEGIN
             FOR relation IN SELECT place_id FROM placex
               WHERE ST_DWithin(location.geometry, placex.geometry, 0.001) and placex.rank_search = 26
                 and st_geometrytype(location.geometry) in ('ST_LineString')
-              ORDER BY (ST_distance(placex.geometry, ST_Line_Interpolate_Point(location.geometry,0))+
-                        ST_distance(placex.geometry, ST_Line_Interpolate_Point(location.geometry,0.5))+
-                        ST_distance(placex.geometry, ST_Line_Interpolate_Point(location.geometry,1))) ASC limit 1
+              ORDER BY (ST_distance(placex.geometry, ST_LineInterpolatePoint(location.geometry,0))+
+                        ST_distance(placex.geometry, ST_LineInterpolatePoint(location.geometry,0.5))+
+                        ST_distance(placex.geometry, ST_LineInterpolatePoint(location.geometry,1))) ASC limit 1
             LOOP
 --RAISE WARNING 'using nearest street to address interpolation line,0.001 %',relation;
               NEW.parent_place_id := relation.place_id;
diff --git a/sql/partition-functions.src.sql b/sql/partition-functions.src.sql
index d9da9b42..235e21a2 100644
--- a/sql/partition-functions.src.sql
+++ b/sql/partition-functions.src.sql
@@ -327,9 +327,9 @@ BEGIN
     RETURN;
   END IF;
 
-  p1 := ST_Line_Interpolate_Point(line,0);
-  p2 := ST_Line_Interpolate_Point(line,0.5);
-  p3 := ST_Line_Interpolate_Point(line,1);
+  p1 := ST_LineInterpolatePoint(line,0);
+  p2 := ST_LineInterpolatePoint(line,0.5);
+  p3 := ST_LineInterpolatePoint(line,1);
 
 -- start
   IF in_partition = -partition- THEN
diff --git a/sql/tiger_import_start.sql b/sql/tiger_import_start.sql
index f40f544b..d9def2b4 100644
--- a/sql/tiger_import_start.sql
+++ b/sql/tiger_import_start.sql
@@ -79,7 +79,7 @@ BEGIN
   FOR housenum IN startnumber..endnumber BY stepsize LOOP
     insert into location_property_tiger_import (place_id, partition, parent_place_id, housenumber, postcode, centroid)
     values (nextval('seq_place'), out_partition, out_parent_place_id, housenum, in_postcode,
-      ST_Line_Interpolate_Point(linegeo, (housenum::float-rangestartnumber::float)/numberrange::float));
+      ST_LineInterpolatePoint(linegeo, (housenum::float-rangestartnumber::float)/numberrange::float));
     newpoints := newpoints + 1;
   END LOOP;
 
diff --git a/utils/setup.php b/utils/setup.php
index fb16254d..99d9e526 100755
--- a/utils/setup.php
+++ b/utils/setup.php
@@ -132,6 +132,10 @@
 		} else {
 			pgsqlRunScript('CREATE EXTENSION postgis');
 		}
+		if ($fPostgisVersion < 2.1) {
+			// Function was renamed in 2.1 and throws an annoying deprecation warning
+			pgsqlRunScript('ALTER FUNCTION st_line_interpolate_point(geometry, double precision) RENAME TO ST_LineInterpolatePoint');
+		}
 		$sVersionString = $oDB->getOne('select postgis_full_version()');
 		preg_match('#POSTGIS="([0-9]+)[.]([0-9]+)[.]([0-9]+)( r([0-9]+))?"#', $sVersionString, $aMatches);
 		if (CONST_Postgis_Version != $aMatches[1].'.'.$aMatches[2])