diff --git a/cddl/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h b/cddl/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h
index 66c8bce3de01..74c9019149ca 100644
--- a/cddl/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h
+++ b/cddl/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h
@@ -470,8 +470,6 @@ extern uint64_t physmem;
 
 #define	gethrestime_sec()	time(NULL)
 
-#define	open64(...)		open(__VA_ARGS__)
-#define	pread64(d, p, n, o)	pread(d, p, n, o)
 #define	pwrite64(d, p, n, o)	pwrite(d, p, n, o)
 #define	readdir64(d)		readdir(d)
 #define	SIGPENDING(td)		(0)
diff --git a/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h b/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h
index 66c8bce3de01..74c9019149ca 100644
--- a/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h
+++ b/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h
@@ -470,8 +470,6 @@ extern uint64_t physmem;
 
 #define	gethrestime_sec()	time(NULL)
 
-#define	open64(...)		open(__VA_ARGS__)
-#define	pread64(d, p, n, o)	pread(d, p, n, o)
 #define	pwrite64(d, p, n, o)	pwrite(d, p, n, o)
 #define	readdir64(d)		readdir(d)
 #define	SIGPENDING(td)		(0)