diff --git a/configure.ac b/configure.ac
index 32be70b3d..e324dd045 100644
--- a/configure.ac
+++ b/configure.ac
@@ -691,6 +691,7 @@ RB_CHK_SYSHEADER(malloc.h, [MALLOC_H])
 RB_CHK_SYSHEADER(sys/auxv.h, [SYS_AUXV_H])
 RB_CHK_SYSHEADER(sys/eventfd.h, [SYS_EVENTFD_H])
 RB_CHK_SYSHEADER(sys/inotify.h, [SYS_INOTIFY_H])
+RB_CHK_SYSHEADER(sys/sysmacros.h, [SYS_SYSMACROS_H])
 RB_CHK_SYSHEADER(linux/aio_abi.h, [LINUX_AIO_ABI_H])
 RB_CHK_SYSHEADER(linux/magic.h, [LINUX_MAGIC_H])
 
diff --git a/ircd/fs.cc b/ircd/fs.cc
index 675418040..9ccf202bb 100644
--- a/ircd/fs.cc
+++ b/ircd/fs.cc
@@ -12,6 +12,7 @@
 #include <RB_INC_SYS_STATFS_H
 #include <RB_INC_SYS_STATVFS_H
 #include <boost/filesystem.hpp>
+#include <RB_INC_SYS_SYSMACROS_H
 #include <ircd/asio.h>
 
 #ifdef IRCD_USE_AIO