diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b7cce51f6..0f157f735 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -137,7 +137,7 @@ add_executable(SRB2SDL2 MACOSX_BUNDLE WIN32
 	k_terrain.c
 	k_brightmap.c
 	k_terrain.c
-	k_director.c
+	k_director.cpp
 	k_follower.c
 	k_profiles.c
 	k_specialstage.c
diff --git a/src/k_director.c b/src/k_director.cpp
similarity index 98%
rename from src/k_director.c
rename to src/k_director.cpp
index e229b46de..64f82cb59 100644
--- a/src/k_director.c
+++ b/src/k_director.cpp
@@ -3,6 +3,8 @@
 /// \file  k_director.c
 /// \brief SRB2kart automatic spectator camera.
 
+#include <algorithm>
+
 #include "k_kart.h"
 #include "k_respawn.h"
 #include "doomdef.h"
@@ -97,7 +99,7 @@ static void K_UpdateDirectorPositions(void)
 
 		if (directorinfo.gap[position] >= BREAKAWAYDIST)
 		{
-			directorinfo.boredom[position] = min(BOREDOMTIME * 2, directorinfo.boredom[position] + 1);
+			directorinfo.boredom[position] = std::min(BOREDOMTIME * 2, directorinfo.boredom[position] + 1);
 		}
 		else if (directorinfo.boredom[position] > 0)
 		{