diff --git a/resources/3rdparty/sylvan/CMakeLists.txt b/resources/3rdparty/sylvan/CMakeLists.txt
index 558b0458d..f2a589603 100644
--- a/resources/3rdparty/sylvan/CMakeLists.txt
+++ b/resources/3rdparty/sylvan/CMakeLists.txt
@@ -51,7 +51,6 @@ include_directories("${PROJECT_SOURCE_DIR}/../../../src")
 include_directories("${PROJECT_BINARY_DIR}/../../../include")
 include_directories(src)
 
-include_directories(src)
 
 add_subdirectory(src)