diff --git a/CMakeLists.txt b/CMakeLists.txt
index fe9c53cb5..e38d383a7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -168,6 +168,7 @@ ELSE(CMAKE_USE_SYSTEM_CURL)
   SET(CURL_SPECIAL_ZLIB_H ${CMAKE_ZLIB_HEADER})
   SET(CURL_SPECIAL_LIBZ_INCLUDES ${CMAKE_ZLIB_INCLUDES})
   SET(CURL_SPECIAL_LIBZ ${CMAKE_ZLIB_LIBRARIES})
+  ADD_DEFINITIONS(-DCURL_STATICLIB)
   SUBDIRS(Utilities/cmcurl)
   SET(CMAKE_CURL_INCLUDES)
   SET(CMAKE_CURL_LIBRARIES cmcurl)