diff --git a/CMakeLists.txt b/CMakeLists.txt
index ede5daf..46c1e55 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -151,6 +151,9 @@ set(LIBRARY_SOVERSION "6")
 # optionally found anyway. Use `-DCMAKE_DISABLE_FIND_PACKAGE_x=TRUE` to disable
 # searching for a packge entirely (x is the CMake package name, so "BZip2"
 # instead of "BZIP2").
+if (ENABLE_DLL_EXPORT)
+  ADD_DEFINITIONS(-DDLL_EXPORT)
+endif()
 option(FT_WITH_ZLIB "Use system zlib instead of internal library." OFF)
 option(FT_WITH_BZIP2 "Support bzip2 compressed fonts." OFF)
 option(FT_WITH_PNG "Support PNG compressed OpenType embedded bitmaps." OFF)
