diff --git a/libs/wine/ldt.c b/libs/wine/ldt.c
index d88cfe4a47d..9f70f111139 100644
--- a/libs/wine/ldt.c
+++ b/libs/wine/ldt.c
@@ -104,7 +104,6 @@ static inline int set_thread_area( struct modify_ldt_s *ptr )
 
 #if defined(__svr4__) || defined(_SCO_DS)
 #include <sys/sysi86.h>
-extern int sysi86(int,void*);
 #ifndef __sun__
 #include <sys/seg.h>
 #endif