diff --git a/.gitignore b/.gitignore
index d71adf6..24e6c22 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,5 @@ Makefile
 */*/Makefile
 pgsql/pointcloud.control
 pgsql/pointcloud--*
+pgsql_postgis/pointcloud_postgis.control
+pgsql_postgis/pointcloud_postgis--*
diff --git a/pgsql_postgis/Makefile b/pgsql_postgis/Makefile
index 8f17bf9..605262b 100644
--- a/pgsql_postgis/Makefile
+++ b/pgsql_postgis/Makefile
@@ -4,8 +4,12 @@ include ../config.mk
 
 #MODULE_big = pointcloud_postgis
 #OBJS =
+SED = sed
 EXTENSION = pointcloud_postgis
-DATA = $(EXTENSION)--1.0.sql
+EXTVERSION=$(shell cat ../Version.config)
+DATA_built = \
+  $(EXTENSION).control \
+  $(EXTENSION)--$(EXTVERSION).sql
 
 #REGRESS = pointcloud
 
@@ -15,3 +19,9 @@ DATA = $(EXTENSION)--1.0.sql
 
 # We are going to use PGXS for sure
 include $(PGXS)
+
+$(EXTENSION).control: $(EXTENSION).control.in Makefile
+	$(SED) -e 's/@POINTCLOUD_VERSION@/$(EXTVERSION)/' $< > $@
+
+$(EXTENSION)--$(EXTVERSION).sql: $(EXTENSION).sql.in Makefile
+	$(SED) -e 's/@POINTCLOUD_VERSION@/$(EXTVERSION)/' $< > $@
diff --git a/pgsql_postgis/pointcloud_postgis.control b/pgsql_postgis/pointcloud_postgis.control.in
similarity index 82%
rename from pgsql_postgis/pointcloud_postgis.control
rename to pgsql_postgis/pointcloud_postgis.control.in
index 01431da..25771d0 100644
--- a/pgsql_postgis/pointcloud_postgis.control
+++ b/pgsql_postgis/pointcloud_postgis.control.in
@@ -1,6 +1,6 @@
 # pointcloud postgis integration extension
 comment = 'integration for pointcloud LIDAR data and PostGIS geometry data'
-default_version = '1.0'
+default_version = '@POINTCLOUD_VERSION@'
 relocatable = true
 superuser = false
 requires = 'postgis, pointcloud'
diff --git a/pgsql_postgis/pointcloud_postgis--1.0.sql b/pgsql_postgis/pointcloud_postgis.sql.in
similarity index 88%
rename from pgsql_postgis/pointcloud_postgis--1.0.sql
rename to pgsql_postgis/pointcloud_postgis.sql.in
index 27b1ecd..408c45b 100644
--- a/pgsql_postgis/pointcloud_postgis--1.0.sql
+++ b/pgsql_postgis/pointcloud_postgis.sql.in
@@ -72,3 +72,10 @@ CREATE OR REPLACE FUNCTION PC_BoundingDiagonalGeometry(pcpatch)
 		SELECT ST_GeomFromEWKB(PC_BoundingDiagonalAsBinary($1))
 	$$
 	LANGUAGE 'sql';
+
+-----------------------------------------------------------------------------
+-- Function returning the version number
+--
+CREATE OR REPLACE FUNCTION PC_PostGIS_Version()
+	RETURNS text AS $$ SELECT '@POINTCLOUD_VERSION@'::text $$
+	LANGUAGE 'sql' IMMUTABLE STRICT;