diff --git a/Utilities/JITASM.cpp b/Utilities/JITASM.cpp
index acb5f40b04..90c09bb0bf 100644
--- a/Utilities/JITASM.cpp
+++ b/Utilities/JITASM.cpp
@@ -14,6 +14,10 @@
 #define CAN_OVERCOMMIT
 #endif
 
+#if defined(__APPLE__)
+#include <mutex>
+#endif
+
 LOG_CHANNEL(jit_log, "JIT");
 
 void jit_announce(uptr func, usz size, std::string_view name)