diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 6f46b5ce9..7f6d2ac86 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -48,6 +48,7 @@ if(NOT ASSIMP_HUNTER_ENABLED)
   INCLUDE_DIRECTORIES(
     ${Assimp_SOURCE_DIR}/contrib/gtest/include
     ${Assimp_SOURCE_DIR}/contrib/gtest/
+    ${Assimp_SOURCE_DIR}/contrib/pugixml/src
   )
 endif()