diff --git a/ggml.h b/ggml.h
index ad962b109..ec28d828b 100644
--- a/ggml.h
+++ b/ggml.h
@@ -176,6 +176,7 @@ extern "C" {
 #include <stdint.h>
 #include <stddef.h>
 #include <stdbool.h>
+#include <mpi.h>
 
 #define GGML_MAX_DIMS     4
 #define GGML_MAX_NODES    4096