diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 44bbc777c..57f67d242 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2002-01-28  Earnie Boyd  <earnie@users.sf.net>
+
+	* include/sys/strace.h (_STRACE_ON): Define.
+	(_STRACE_OFF): Ditto.
+
 2002-01-24  Christopher Faylor  <cgf@redhat.com>
 
 	* speclib: Ensure that temporary def file is removed.
diff --git a/winsup/cygwin/include/sys/strace.h b/winsup/cygwin/include/sys/strace.h
index 87cc1d785..7b0e1a2cc 100644
--- a/winsup/cygwin/include/sys/strace.h
+++ b/winsup/cygwin/include/sys/strace.h
@@ -77,6 +77,13 @@ extern strace strace;
 #define _STRACE_MALLOC	 0x20000 // trace malloc calls
 #define _STRACE_THREAD	 0x40000 // thread-locking calls
 #define _STRACE_NOTALL	 0x80000 // don't include if _STRACE_ALL
+#if defined (DEBUGGING)
+# define _STRACE_ON strace.active = 1;
+# define _STRACE_OFF strace.active = 0;
+#else
+# define _STRACE_ON
+# define _STRACE_OFF
+#endif
 
 #ifdef __cplusplus
 extern "C" {