diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d7f4c7705..042ccda03 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -112,7 +112,7 @@ add_executable(SRB2SDL2 MACOSX_BUNDLE WIN32
 	lua_hudlib_drawlist.c
 	k_kart.c
 	k_respawn.c
-	k_collide.c
+	k_collide.cpp
 	k_color.c
 	k_race.c
 	k_battle.c
diff --git a/src/k_collide.c b/src/k_collide.cpp
similarity index 99%
rename from src/k_collide.c
rename to src/k_collide.cpp
index 5d089c67f..1debfd0c1 100644
--- a/src/k_collide.c
+++ b/src/k_collide.cpp
@@ -1,4 +1,4 @@
-/// \file  k_collide.c
+/// \file  k_collide.cpp
 /// \brief SRB2Kart item collision hooks
 
 #include "k_collide.h"