diff --git a/infra/tuple/CMakeLists.txt b/infra/tuple/CMakeLists.txt
index ea2df1c..9399d2d 100644
--- a/infra/tuple/CMakeLists.txt
+++ b/infra/tuple/CMakeLists.txt
@@ -1,4 +1,4 @@
-add_library(tuple tuple.cpp)
+add_library(tuple tuple.c)
 target_include_directories(tuple PUBLIC ${CMAKE_CURRENT_LIST_DIR})
 target_include_directories(tuple PUBLIC ${CMAKE_SOURCE_DIR}/deps/crc32)
 target_include_directories(tuple PUBLIC ${CMAKE_SOURCE_DIR}/include)
diff --git a/infra/tuple/tuple.cpp b/infra/tuple/tuple.c
similarity index 100%
rename from infra/tuple/tuple.cpp
rename to infra/tuple/tuple.c