diff --git a/src/llama-mmap.cpp b/src/llama-mmap.cpp
index 57c6e4f51..b716630a8 100644
--- a/src/llama-mmap.cpp
+++ b/src/llama-mmap.cpp
@@ -7,6 +7,7 @@
 #include <cstring>
 #include <climits>
 #include <stdexcept>
+#include <cerrno>
 
 #ifdef __has_include
     #if __has_include(<unistd.h>)