diff --git a/library/GNUmakefile.68k b/library/GNUmakefile.68k
index 3bb81be..495640a 100644
--- a/library/GNUmakefile.68k
+++ b/library/GNUmakefile.68k
@@ -1,5 +1,5 @@
 #
-# $Id: GNUmakefile.68k,v 1.81 2006-04-05 07:53:23 obarthel Exp $
+# $Id: GNUmakefile.68k,v 1.82 2006-04-05 08:19:11 obarthel Exp $
 #
 # :ts=8
 #
@@ -105,7 +105,7 @@ WARNINGS = \
 
 INCLUDES = -Iinclude -I. -Inetinclude
 #OPTIONS = -fno-builtin -fno-common -DDEBUG
- OPTIONS = -fno-builtin -fno-common -DNDEBUG
+ OPTIONS = -fno-builtin -fno-common -DNDEBUG -D__THREAD_SAFE
 #OPTIONS = -fno-builtin -fno-common -D__MEM_DEBUG
 #OPTIONS = -fno-builtin -fno-common -DDEBUG -D__MEM_DEBUG -DNO_INLINE_STDARG
  OPTIMIZE = -O -fomit-frame-pointer -fstrength-reduce -finline-functions
diff --git a/library/unistd_chown.c b/library/unistd_chown.c
index 2d07dab..a5a6061 100644
--- a/library/unistd_chown.c
+++ b/library/unistd_chown.c
@@ -1,5 +1,5 @@
 /*
- * $Id: unistd_chown.c,v 1.10 2006-04-05 06:43:56 obarthel Exp $
+ * $Id: unistd_chown.c,v 1.11 2006-04-05 08:19:11 obarthel Exp $
  *
  * :ts=4
  *
@@ -116,8 +116,8 @@ chown(const char * path_name, uid_t owner, gid_t group)
 
 		/* Try to find out which owner/group information
 		   is currently in use. */
-		lock = Lock(path_name,SHARED_LOCK);
-		if(lock == ZERO || CANNOT Examine(file_lock,fib))
+		file_lock = Lock((STRPTR)path_name,SHARED_LOCK);
+		if(file_lock == ZERO || CANNOT Examine(file_lock,fib))
 		{
 			PROFILE_ON();
 
@@ -125,8 +125,8 @@ chown(const char * path_name, uid_t owner, gid_t group)
 			goto out;
 		}
 
-		UnLock(lock);
-		lock = ZERO;
+		UnLock(file_lock);
+		file_lock = ZERO;
 
 		PROFILE_ON();