diff --git a/lib/libc/string/memmem.3 b/lib/libc/string/memmem.3
index d026bb913a40..73c267c14c10 100644
--- a/lib/libc/string/memmem.3
+++ b/lib/libc/string/memmem.3
@@ -38,8 +38,8 @@
 .In string.h
 .Ft "void *"
 .Fo memmem
-.Fa "const char *big" "size_t big_len"
-.Fa "const char *little" "size_t little_len"
+.Fa "const void *big" "size_t big_len"
+.Fa "const void *little" "size_t little_len"
 .Fc
 .Sh DESCRIPTION
 The