diff --git a/vendor/SOIL2/CMakeLists.txt b/vendor/SOIL2/CMakeLists.txt
index 0a52d1df2..f9ccc85f2 100644
--- a/vendor/SOIL2/CMakeLists.txt
+++ b/vendor/SOIL2/CMakeLists.txt
@@ -22,8 +22,10 @@ add_library(SOIL2 OBJECT
         )
 
 target_include_directories(SOIL2
-        PUBLIC
+        PRIVATE
         "."
+        PUBLIC
+        "${CMAKE_CURRENT_SOURCE_DIR}/.."
         )
 
 target_link_libraries(SOIL2