diff --git a/CMakeLists.txt b/CMakeLists.txt
index 092d74d..b7210db 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -350,7 +350,7 @@ elseif(WIN32 AND MINGW)
 endif()
 
 
-IF(NOT Boost_UNIT_TEST_FRAMEWORK_LIBRARY MATCHES "\\.(a|lib)$")
+IF(Boost_UNIT_TEST_FRAMEWORK_LIBRARY MATCHES "\\.(so|dll)$")
 IF(MSVC)
 add_definitions(/DBOOST_TEST_DYN_LINK)
 ELSE(MSVC)