diff --git a/common/api/api_server.cpp b/common/api/api_server.cpp
index 3610f6bcc6..3a1a7ba5d9 100644
--- a/common/api/api_server.cpp
+++ b/common/api/api_server.cpp
@@ -37,6 +37,10 @@
 
 #include <api/common/envelope.pb.h>
 
+#ifdef __UNIX__
+#include <sys/file.h>
+#endif
+
 using kiapi::common::ApiRequest, kiapi::common::ApiResponse, kiapi::common::ApiStatusCode;