diff --git a/Core/HLE/sceKernelThread.cpp b/Core/HLE/sceKernelThread.cpp
index 8193d0f93d..378ff87dbc 100644
--- a/Core/HLE/sceKernelThread.cpp
+++ b/Core/HLE/sceKernelThread.cpp
@@ -18,6 +18,7 @@
 #include <set>
 #include <map>
 #include <queue>
+#include <algorithm>
 
 #include "HLE.h"
 #include "HLETables.h"