diff --git a/lib/libc/stdio/getc.3 b/lib/libc/stdio/getc.3
index 570867b56c5b..83a353d1382d 100644
--- a/lib/libc/stdio/getc.3
+++ b/lib/libc/stdio/getc.3
@@ -60,7 +60,7 @@
 .Ft int
 .Fn getchar
 .Ft int
-.Fn getchar_unlocked "FILE *stream"
+.Fn getchar_unlocked "void"
 .Ft int
 .Fn getw "FILE *stream"
 .Sh DESCRIPTION