diff --git a/src/syssignal.h b/src/syssignal.h
index a732301fc8d..0bac2acebc7 100644
--- a/src/syssignal.h
+++ b/src/syssignal.h
@@ -119,9 +119,6 @@ sigset_t sys_sigsetmask (/*sigset_t new_mask*/);
 #ifndef BSD4_1
 #define sigfree() sigsetmask (SIGEMPTYMASK)
 #define sigholdx(sig) sigsetmask (sigmask (sig))
-#ifdef __DJGPP__
-#define sigblock(sig) 0
-#endif
 #define sigblockx(sig) sigblock (sigmask (sig))
 #define sigunblockx(sig) sigblock (SIGEMPTYMASK)
 #define sigpausex(sig) sigpause (0)