diff --git a/ggml/src/ggml-metal/ggml-metal.cpp b/ggml/src/ggml-metal/ggml-metal.cpp
index a616dcdb46..1c705362fb 100644
--- a/ggml/src/ggml-metal/ggml-metal.cpp
+++ b/ggml/src/ggml-metal/ggml-metal.cpp
@@ -7,6 +7,9 @@
 #include "ggml-metal-context.h"
 #include "ggml-metal-ops.h"
 
+#include <mutex>
+#include <string>
+
 #define GGML_METAL_NAME "MTL"
 #define GGML_METAL_MAX_DEVICES 16