diff --git a/sapi/fpm/fpm/fpm_sockets.h b/sapi/fpm/fpm/fpm_sockets.h
index 5b9c698c2ad..499ba6baf89 100644
--- a/sapi/fpm/fpm/fpm_sockets.h
+++ b/sapi/fpm/fpm/fpm_sockets.h
@@ -7,6 +7,7 @@
 
 #include <sys/types.h>
 #include <sys/socket.h>
+#include <sys/un.h>
 #include <unistd.h>
 #include <fcntl.h>