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-rw-r--r--sys/sys/cdefs.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/sys/cdefs.h b/sys/sys/cdefs.h
index 71c9a05b6c53..a78e23db62c4 100644
--- a/sys/sys/cdefs.h
+++ b/sys/sys/cdefs.h
@@ -297,11 +297,11 @@
/* Deal with various X/Open Portability Guides and Single UNIX Spec. */
#ifdef _XOPEN_SOURCE
-#if _XOPEN_SOURCE >= 600
+#if _XOPEN_SOURCE - 0 >= 600
#define __XSI_VISIBLE 600
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 200112
-#elif _XOPEN_SOURCE >= 500
+#elif _XOPEN_SOURCE - 0 >= 500
#define __XSI_VISIBLE 500
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 199506