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-rw-r--r--time/time.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/time/time.h b/time/time.h
index 9178d5f2da..edf34fb7e1 100644
--- a/time/time.h
+++ b/time/time.h
@@ -273,7 +273,7 @@ extern time_t timegm (struct tm *__tp) __THROW;
 extern time_t timelocal (struct tm *__tp) __THROW;
 
 /* Return the number of days in YEAR.  */
-extern int dysize (int __year) __THROW;
+extern int dysize (int __year) __THROW  __attribute__ ((__const__));
 # endif