diff --git a/kernel/include/std/errno.h b/kernel/include/std/errno.h
index 0d9c4b73..c2c59830 100644
--- a/kernel/include/std/errno.h
+++ b/kernel/include/std/errno.h
@@ -3,6 +3,7 @@
 #define EPERM 1
 #define ENOENT 2
 #define ESRCH 3
+#define EINTR 4
 #define ENOEXEC 8
 #define EBADF 9
 #define ENOMEM 12
@@ -12,6 +13,7 @@
 #define EISDIR 21
 #define EINVAL 22
 #define EMFILE 24
+#define ENOTTY 25
 #define ENOSPC 28
 #define ENOSYS 38
 #define ENOTSUP 95
\ No newline at end of file
diff --git a/libs/libc/include/errno.h b/libs/libc/include/errno.h
index 37487b9d..78868490 100644
--- a/libs/libc/include/errno.h
+++ b/libs/libc/include/errno.h
@@ -7,6 +7,7 @@ extern int errno;
 #define EPERM 1    // Operation not permitted
 #define ENOENT 2   // No such file or directory
 #define ESRCH 3    // No such process
+#define EINTR 4    // Interrupted system call. Not implemented.
 #define ENOEXEC 8  // Exec format error
 #define EBADF 9    // Bad file descriptor
 #define ENOMEM 12  // Cannot allocate memory
@@ -16,6 +17,7 @@ extern int errno;
 #define EISDIR 21  // Is a directory
 #define EINVAL 22  // Invalid argument
 #define EMFILE 24  // Too many open files
+#define ENOTTY 25  // Inappropriate ioctl for device
 #define ENOSPC 28  // No space left on device
 #define EPIPE 32   // Broken pipe. Not implemented.
 #define ENOSYS 38  // Function not implemented
diff --git a/libs/libc/include/sys/types.h b/libs/libc/include/sys/types.h
index 421f1e45..60304dd4 100644
--- a/libs/libc/include/sys/types.h
+++ b/libs/libc/include/sys/types.h
@@ -16,4 +16,7 @@ typedef long int off_t;
 /* The type of a file's mode. */
 typedef unsigned short mode_t;
 
+/* The type of a filesystem inode. */
+typedef unsigned long ino_t;
+
 #endif
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