diff --git a/src/lib/libc/stdlib/ecvt.3 b/src/lib/libc/stdlib/ecvt.3
index 64559ec0..8aee2daa 100644
--- a/src/lib/libc/stdlib/ecvt.3
+++ b/src/lib/libc/stdlib/ecvt.3
@@ -169,4 +169,4 @@ The
 and
 .Fn gcvt
 functions conform to
-.St -susv3 .
+.St -p1003.1-01 .