diff --git a/SuperBuild/CMake/External_boost.cmake b/SuperBuild/CMake/External_boost.cmake
index cc117091e0d16d1560f97d91bb5817905e81b6c1..edd73c86b09dd7b68cfa622f67947722e81e7f5f 100644
--- a/SuperBuild/CMake/External_boost.cmake
+++ b/SuperBuild/CMake/External_boost.cmake
@@ -60,7 +60,7 @@ if ( WIN32 )
     set(BOOST_SB_CONFIG 
       ${BOOST_SB_CONFIG}
       address-model=64)
-  elseif()()
+  else()
     set(BOOST_SB_CONFIG 
       ${BOOST_SB_CONFIG}
       address-model=32)