diff --git a/libmaxsi/decl/dev_t.h b/libmaxsi/decl/dev_t.h
new file mode 100644
index 00000000..bc99ab43
--- /dev/null
+++ b/libmaxsi/decl/dev_t.h
@@ -0,0 +1,4 @@
+#ifndef _DEV_T_DECL
+#define _DEV_T_DECL
+typedef __dev_t dev_t;
+#endif
diff --git a/libmaxsi/include/sys/stat.h b/libmaxsi/include/sys/stat.h
index 515aabf7..b19b9375 100644
--- a/libmaxsi/include/sys/stat.h
+++ b/libmaxsi/include/sys/stat.h
@@ -32,6 +32,7 @@
 __BEGIN_DECLS
 @include(blkcnt_t.h)
 @include(blksize_t.h)
+@include(dev_t.h)
 @include(ino_t.h)
 @include(mode_t.h)
 @include(nlink_t.h)
diff --git a/sortix/stat.h b/sortix/stat.h
index 7775fb4e..2d364ab7 100644
--- a/sortix/stat.h
+++ b/sortix/stat.h
@@ -32,6 +32,7 @@ __BEGIN_DECLS
 
 struct stat
 {
+	dev_t st_dev;
 	ino_t st_ino;
 	mode_t st_mode;
 	nlink_t st_nlink;
diff --git a/sortix/x64/bits.h b/sortix/x64/bits.h
index b161df4a..e67c94ec 100644
--- a/sortix/x64/bits.h
+++ b/sortix/x64/bits.h
@@ -129,6 +129,7 @@ typedef __off_t __blksize_t;
 typedef __off_t __blkcnt_t;
 typedef unsigned int __nlink_t;
 typedef __uintmax_t __ino_t;
+typedef __uintptr_t __dev_t;
 
 #endif
 
diff --git a/sortix/x86/bits.h b/sortix/x86/bits.h
index d5b3b0cd..c8c41033 100644
--- a/sortix/x86/bits.h
+++ b/sortix/x86/bits.h
@@ -129,6 +129,7 @@ typedef __off_t __blksize_t;
 typedef __off_t __blkcnt_t;
 typedef unsigned int __nlink_t;
 typedef __uintmax_t __ino_t;
+typedef __uintptr_t __dev_t;
 
 #endif