diff --git a/CMakeLists.txt b/CMakeLists.txt
index 99bf31f..11efd87 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -168,6 +168,7 @@
 endif()
 
 include_directories(include/)
+include_directories(library/)
 
 if(ENABLE_ZLIB_SUPPORT)
     find_package(ZLIB)