diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2475881..3828a13 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -54,6 +54,14 @@ set (PROJECT_SOURCE_DIR "${sigc++_SOURCE_DIR}/sigc++")
 include_directories (${sigc++_SOURCE_DIR})
 include_directories (${sigc++_BINARY_DIR})
 
+if (BUILD_SHARED_LIBS)
+    if (MSVC)
+        add_compile_options (-D_WINDLL)
+    endif()
+else()
+    add_compile_options (-DLIBSIGCXX_STATIC)
+endif()
+
 configure_file (sigc++config.h.cmake sigc++config.h)
 
 set (prefix ${CMAKE_INSTALL_PREFIX})