diff --git a/CMakeLists.txt b/CMakeLists.txt
index be6a5f405..798508a15 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -83,6 +83,12 @@ SUBDIRS(Utilities/cmcurl)
 SET(CMAKE_CURL_INCLUDES "${CMAKE_CURRENT_SOURCE_DIR}/Utilities")
 SET(CMAKE_CURL_LIBRARIES "cmcurl")
 
+#-----------------------------------------------------------------------------
+# Build Curl library for CTest.
+SUBDIRS(Utilities/cmtar)
+SET(CMAKE_TAR_INCLUDES "${CMAKE_CURRENT_BINARY_DIR}/Utilities")
+SET(CMAKE_TAR_LIBRARIES "cmtar")
+
 #-----------------------------------------------------------------------------
 # Build expat library for CMake and CTest.
 SUBDIRS(Utilities/cmexpat)