diff --git a/CMakeLists.txt b/CMakeLists.txt
index 324b5c91..44574610 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,6 +42,15 @@ unset(PostgreSQL_TYPE_INCLUDE_DIR CACHE)
 set(PostgreSQL_TYPE_INCLUDE_DIR "/usr/include/")
 find_package(PostgreSQL REQUIRED)
 include_directories(${PostgreSQL_INCLUDE_DIRS})
+find_program(OSMOSIS osmosis)
+if (NOT EXISTS "${OSMOSIS}")
+        set(OSMOSIS_PATH "/nonexistent")
+        message(WARNING "Osmosis not found (required for updates)")
+else()
+        set(OSMOSIS_PATH "${OSMOSIS}")
+        message(STATUS "Using osmosis at ${OSMOSIS_PATH}")
+endif()
+
 
 find_program(PG_CONFIG pg_config)
 execute_process(COMMAND ${PG_CONFIG} --pgxs
diff --git a/settings/defaults.php b/settings/defaults.php
index e34f4db0..0b63a3bd 100644
--- a/settings/defaults.php
+++ b/settings/defaults.php
@@ -40,7 +40,7 @@ if (isset($_GET['debug']) && $_GET['debug']) @define('CONST_Debug', true);
 
 // Paths
 @define('CONST_Osm2pgsql_Binary', CONST_InstallPath.'/osm2pgsql/osm2pgsql');
-@define('CONST_Osmosis_Binary', '/usr/bin/osmosis');
+@define('CONST_Osmosis_Binary', '@OSMOSIS_PATH@');
 @define('CONST_Tiger_Data_Path', CONST_BasePath.'/data/tiger');
 @define('CONST_Wikipedia_Data_Path', CONST_BasePath.'/data');