diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1e17ce4..5c425c8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -150,7 +150,7 @@ if(FFMC_BUILD_TESTING)
     )
 
     target_include_directories(FFMCTest PRIVATE
-        FfFrameReader/test
+        "${FfFrameReader_SOURCE_DIR}/test"
     )
 
     target_link_libraries(FFMCTest
@@ -202,4 +202,4 @@ if(FFMC_BUILD_PYTHON_BINDING)
     )
 
     add_dependencies(pyMultiCrop FfMultiCrop)
-endif()
\ No newline at end of file
+endif()