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-rw-r--r--man3/strftime.31
1 files changed, 1 insertions, 0 deletions
diff --git a/man3/strftime.3 b/man3/strftime.3
index 9a10275ca..f16d4a3f7 100644
--- a/man3/strftime.3
+++ b/man3/strftime.3
@@ -24,6 +24,7 @@ Standard C library
.nf
.B #include <time.h>
.PP
+.B [[gnu::nonnull]]
.BI "size_t strftime(char *restrict " s ", size_t " max ,
.BI " const char *restrict " format ,
.BI " const struct tm *restrict " tm );