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-rw-r--r--xorg-server/include/os.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/xorg-server/include/os.h b/xorg-server/include/os.h
index b8a5f21b9..fdcd95d31 100644
--- a/xorg-server/include/os.h
+++ b/xorg-server/include/os.h
@@ -323,7 +323,8 @@ extern _X_EXPORT void
OsCleanup(Bool);
extern _X_EXPORT void
-OsVendorFatalError(const char *f, va_list args);
+OsVendorFatalError(const char *f, va_list args)
+_X_ATTRIBUTE_PRINTF(1, 0);
extern _X_EXPORT void
OsVendorInit(void);