diff --git a/games/pioneer/gcc-14.diff b/games/pioneer/gcc-14.diff
new file mode 100644
index 00000000000..f71de6c62bd
--- /dev/null
+++ b/games/pioneer/gcc-14.diff
@@ -0,0 +1,10 @@
+--- src/Input.h.orig	2024-05-18 09:08:26.973952781 +0900
++++ src/Input.h	2024-05-18 09:08:44.313951316 +0900
+@@ -12,6 +12,7 @@
+ #include <vector>
+ #include <map>
+ #include <string>
++#include <algorithm>
+ 
+ class IniConfig;
+ 
diff --git a/games/pioneer/pioneer.SlackBuild b/games/pioneer/pioneer.SlackBuild
index d7d399338f4..3162d6de455 100644
--- a/games/pioneer/pioneer.SlackBuild
+++ b/games/pioneer/pioneer.SlackBuild
@@ -85,6 +85,8 @@ fi
 
 # Fix save compatibility (#5798).
 patch -p0 < $CWD/save-compat.diff
+# GCC 14 compatibility.
+patch -p0 < $CWD/gcc-14.diff
 
 GLEW=OFF
 LUA=OFF