diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+v0.1.2.2
+
+	* Fix compilation error when libcap is not installed.
+
 v0.1.2.1
 
 	* Support cloneRangeIfSame on read-only subvolumes (requires
diff --git a/btrfs.cabal b/btrfs.cabal
--- a/btrfs.cabal
+++ b/btrfs.cabal
@@ -1,5 +1,5 @@
 name:                btrfs
-version:             0.1.2.1
+version:             0.1.2.2
 synopsis:            Bindings to the btrfs API
 description:
   This package provides bindings to the low-level btrfs API (i.e. the
@@ -32,6 +32,7 @@
   include/btrfs/list.h
   include/btrfs/radix-tree.h
   include/btrfs/rbtree.h
+  include/sys/capability.h
   make-bytestring.hs
 
 source-repository head
diff --git a/include/sys/capability.h b/include/sys/capability.h
new file mode 100644
--- /dev/null
+++ b/include/sys/capability.h
@@ -0,0 +1,127 @@
+/*
+ * <sys/capability.h>
+ *
+ * Copyright (C) 1997   Aleph One
+ * Copyright (C) 1997-8,2008 Andrew G. Morgan <morgan@kernel.org>
+ *
+ * defunct POSIX.1e Standard: 25.2 Capabilities           <sys/capability.h>
+ */
+
+#ifndef _SYS_CAPABILITY_H
+#define _SYS_CAPABILITY_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * This file complements the kernel file by providing prototype
+ * information for the user library.
+ */
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <linux/types.h>
+
+#ifndef __user
+#define __user
+#endif
+#include <linux/capability.h>
+#include <linux/xattr.h>
+
+/*
+ * POSIX capability types
+ */
+
+/*
+ * Opaque capability handle (defined internally by libcap)
+ * internal capability representation
+ */
+typedef struct _cap_struct *cap_t;
+
+/* "external" capability representation is a (void *) */
+
+/*
+ * This is the type used to identify capabilities
+ */
+
+typedef int cap_value_t;
+
+/*
+ * Set identifiers
+ */
+typedef enum {
+    CAP_EFFECTIVE=0,                        /* Specifies the effective flag */
+    CAP_PERMITTED=1,                        /* Specifies the permitted flag */
+    CAP_INHERITABLE=2                     /* Specifies the inheritable flag */
+} cap_flag_t;
+
+/*
+ * These are the states available to each capability
+ */
+typedef enum {
+    CAP_CLEAR=0,                            /* The flag is cleared/disabled */
+    CAP_SET=1                                    /* The flag is set/enabled */
+} cap_flag_value_t;
+
+/*
+ * User-space capability manipulation routines
+ */
+
+/* libcap/cap_alloc.c */
+extern cap_t   cap_dup(cap_t);
+extern int     cap_free(void *);
+extern cap_t   cap_init(void);
+
+/* libcap/cap_flag.c */
+extern int     cap_get_flag(cap_t, cap_value_t, cap_flag_t, cap_flag_value_t *);
+extern int     cap_set_flag(cap_t, cap_flag_t, int, const cap_value_t *,
+			    cap_flag_value_t);
+extern int     cap_clear(cap_t);
+extern int     cap_clear_flag(cap_t, cap_flag_t);
+
+/* libcap/cap_file.c */
+extern cap_t   cap_get_fd(int);
+extern cap_t   cap_get_file(const char *);
+extern int     cap_set_fd(int, cap_t);
+extern int     cap_set_file(const char *, cap_t);
+
+/* libcap/cap_proc.c */
+extern cap_t   cap_get_proc(void);
+extern cap_t   cap_get_pid(pid_t);
+extern int     cap_set_proc(cap_t);
+
+extern int     cap_get_bound(cap_value_t);
+extern int     cap_drop_bound(cap_value_t);
+
+#define CAP_IS_SUPPORTED(cap)  (cap_get_bound(cap) >= 0)
+
+/* libcap/cap_extint.c */
+extern ssize_t cap_size(cap_t);
+extern ssize_t cap_copy_ext(void *, cap_t, ssize_t);
+extern cap_t   cap_copy_int(const void *);
+
+/* libcap/cap_text.c */
+extern cap_t   cap_from_text(const char *);
+extern char *  cap_to_text(cap_t, ssize_t *);
+extern int     cap_from_name(const char *, cap_value_t *);
+extern char *  cap_to_name(cap_value_t);
+
+#define CAP_DIFFERS(result, flag)  (((result) & (1 << (flag))) != 0)
+extern int     cap_compare(cap_t, cap_t);
+
+/* system calls - look to libc for function to system call mapping */
+extern int capset(cap_user_header_t header, cap_user_data_t data);
+extern int capget(cap_user_header_t header, const cap_user_data_t data);
+
+/* deprecated - use cap_get_pid() */
+extern int capgetp(pid_t pid, cap_t cap_d);
+
+/* not valid with filesystem capability support - use cap_set_proc() */
+extern int capsetp(pid_t pid, cap_t cap_d);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SYS_CAPABILITY_H */