diff --git a/winsup/mingw/ChangeLog b/winsup/mingw/ChangeLog
index 9d7d2b301..8c10559cf 100644
--- a/winsup/mingw/ChangeLog
+++ b/winsup/mingw/ChangeLog
@@ -1,3 +1,8 @@
+2005-01-26  Oliver Stoeneberg  <oliverst@online.de>
+
+	* include/malloc.h: Add missing return code defines for
+	_heapwalk()
+
 2005-01-17  Danny Smith  <dannysmith@users.sourceforge.net>
 
 	* include/sys/stat.h (struct __stat64): Change st_size type to
diff --git a/winsup/mingw/include/malloc.h b/winsup/mingw/include/malloc.h
index dac7ee4c7..9c530f019 100644
--- a/winsup/mingw/include/malloc.h
+++ b/winsup/mingw/include/malloc.h
@@ -35,6 +35,14 @@ typedef	struct _heapinfo
 #define _USEDENTRY 0
 #define _FREEENTRY 1
 
+/* Return codes for _heapwalk()  */
+#define _HEAPEMPTY	(-1)
+#define _HEAPOK		(-2)
+#define _HEAPBADBEGIN	(-3)
+#define _HEAPBADNODE	(-4)
+#define _HEAPEND	(-5)
+#define _HEAPBADPTR	(-6)
+
 #ifdef	__cplusplus
 extern "C" {
 #endif