Index: toltcl/ThirdParty/CMakeLists.txt
===================================================================
--- toltcl/ThirdParty/CMakeLists.txt	(revision 0f1a83be6902888ab3077cef26eed1968f700b20)
+++ toltcl/ThirdParty/CMakeLists.txt	(revision e9c313f0dff7e081c884fdebe5d20f2e22de48b5)
@@ -5,6 +5,11 @@
 
 if( BUILD_TCLCURL )
+  if( TCLCURL_VERSION )
+    set( tclcurl_tgz "TclCurl-${TCLCURL_VERSION}.tar.gz" )
+  else( TCLCURL_VERSION )
+    set( tclcurl_tgz "TclCurl-7.22.0.tar.gz" )
+  endif( TCLCURL_VERSION )
   ExternalProject_Add( tclcurl
-    URL ${CMAKE_CURRENT_SOURCE_DIR}/TclCurl-7.22.0.tar.gz
+    URL ${CMAKE_CURRENT_SOURCE_DIR}/${tclcurl_tgz}
     PREFIX ${CMAKE_CURRENT_BINARY_DIR}
     CONFIGURE_COMMAND ${CMAKE_CURRENT_BINARY_DIR}/src/tclcurl/configure