diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index a59cc97e6..c014efd53 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,7 @@
+2015-06-22  Corinna Vinschen  <corinna@vinschen.de>
+
+	* libc/include/sys/signal.h: Include forgotten sys/cdefs.h.
+
 2015-06-20  Corinna Vinschen  <corinna@vinschen.de>
 
 	* libc/include/sys/signal.h: Move altstack macros completely
diff --git a/newlib/libc/include/sys/signal.h b/newlib/libc/include/sys/signal.h
index 6283e8908..af5a489cb 100644
--- a/newlib/libc/include/sys/signal.h
+++ b/newlib/libc/include/sys/signal.h
@@ -7,6 +7,7 @@ extern "C" {
 #endif
 
 #include "_ansi.h"
+#include <sys/cdefs.h>
 #include <sys/features.h>
 #include <sys/types.h>
 #include <sys/_timespec.h>