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-rw-r--r--ace/os_include/sys/os_wait.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/ace/os_include/sys/os_wait.h b/ace/os_include/sys/os_wait.h
index 92dc36e6ec3..8b36fedfe1d 100644
--- a/ace/os_include/sys/os_wait.h
+++ b/ace/os_include/sys/os_wait.h
@@ -37,6 +37,10 @@ extern "C"
{
#endif /* __cplusplus */
+#if !defined (WNOHANG)
+# define WNOHANG 0100
+#endif /* !WNOHANG */
+
#ifdef __cplusplus
}
#endif /* __cplusplus */