diff --git a/man2/readahead.2 b/man2/readahead.2
index 13d94f166..8d00d799a 100644
--- a/man2/readahead.2
+++ b/man2/readahead.2
@@ -30,7 +30,7 @@ readahead \- perform file readahead into page cache
 .B #define _GNU_SOURCE
 .B #include <fcntl.h>
 .sp
-.BI "ssize_t readahead(int " fd ", off64_t *" offset ", size_t " count );
+.BI "ssize_t readahead(int " fd ", off64_t " offset ", size_t " count );
 .fi
 .SH DESCRIPTION
 .BR readahead ()