diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index c81fb9e39..5b60fe365 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,7 @@
+2006-07-04  Corinna Vinschen  <corinna@vinschen.de>
+
+	* signal.cc (signal): Set sa_mask to sig.
+
 2006-07-04  Corinna Vinschen  <corinna@vinschen.de>
 
 	* Makefile.in (DLL_OFILES): Add rexec.o.
diff --git a/winsup/cygwin/signal.cc b/winsup/cygwin/signal.cc
index 2510d22cb..ff769e471 100644
--- a/winsup/cygwin/signal.cc
+++ b/winsup/cygwin/signal.cc
@@ -74,7 +74,7 @@ signal (int sig, _sig_func_ptr func)
   else
     gs.sa_flags |= SA_RESTART;
 
-  gs.sa_mask = 0;
+  gs.sa_mask = SIGTOMASK (sig);
   gs.sa_handler = func;
   gs.sa_flags &= ~SA_SIGINFO;