diff -Nur spatialindex-src-1.7.1/CMakeLists.txt spatialindex-src-1.7.1-includedir/CMakeLists.txt
--- spatialindex-src-1.7.1/CMakeLists.txt	2011-12-12 15:46:53.000000000 +0100
+++ spatialindex-src-1.7.1-includedir/CMakeLists.txt	2012-04-09 11:22:43.888118809 +0200
@@ -27,6 +27,7 @@
 SET(SIDX_VERSION_MINOR "7")
 SET(SIDX_VERSION_PATCH "1")
 SET(SIDX_LIB_SOVERSION "2.0.0")
+SET(SIDX_C_LIB_SOVERSION "2.0.0")
 
 
 set(SIDX_VERSION_STRING "${SIDX_VERSION_MAJOR}.${SIDX_VERSION_MINOR}.${SIDX_VERSION_PATCH}")
diff -Nur spatialindex-src-1.7.1/src/CMakeLists.txt spatialindex-src-1.7.1-includedir/src/CMakeLists.txt
--- spatialindex-src-1.7.1/src/CMakeLists.txt	2011-12-12 15:46:54.000000000 +0100
+++ spatialindex-src-1.7.1-includedir/src/CMakeLists.txt	2012-04-09 11:23:08.245891832 +0200
@@ -205,10 +205,10 @@
 
 
 set_target_properties(${SIDX_LIB_NAME}
-  PROPERTIES SOVERSION "${SIDX_LIB_SOVERSION}" )
+    PROPERTIES VERSION "${SIDX_LIB_SOVERSION}" SOVERSION 2)
 
 set_target_properties(${SIDX_C_LIB_NAME} 
-  PROPERTIES SOVERSION "${SIDX_C_LIB_SOVERSION}" )
+    PROPERTIES VERSION "${SIDX_C_LIB_SOVERSION}" SOVERSION 2)
 
 
 
@@ -233,5 +233,5 @@
   ARCHIVE DESTINATION ${SIDX_LIB_DIR})
 
 install(DIRECTORY ${SIDX_HEADERS_DIR}
-  DESTINATION include/libspatialindex
+  DESTINATION include/spatialindex
   FILES_MATCHING PATTERN "*.h" PATTERN "*.hpp")