diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 9422f40..429078e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -10,4 +10,4 @@ add_library(
   slope/objectives/binomial.cpp
   slope/objectives/gaussian.cpp)
 
-# target_include_directories(libslope INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
+target_include_directories(libslope PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})