diff --git a/SuperBuild/CMake/External_qwt.cmake b/SuperBuild/CMake/External_qwt.cmake
index 0bf4da29f63bd9cec07fc8ffc04391a0f7dcaa40..f7d40c017b1726d1d02484fad33b0e967d7dd8fb 100644
--- a/SuperBuild/CMake/External_qwt.cmake
+++ b/SuperBuild/CMake/External_qwt.cmake
@@ -72,3 +72,10 @@ ExternalProject_Add(QWT
   )
 
 SUPERBUILD_PATCH_SOURCE(QWT)
+
+set(_SB_QWT_INCLUDE_DIR ${SB_INSTALL_PREFIX}/include)
+if(WIN32)
+  set(_SB_QWT_LIBRARY ${SB_INSTALL_PREFIX}/lib/qwt_i.lib)
+elseif(UNIX)
+  set(_SB_QWT_LIBRARY ${SB_INSTALL_PREFIX}/lib/libqwt${CMAKE_SHARED_LIBRARY_SUFFIX})
+endif()