diff --git a/man3/bswap.3 b/man3/bswap.3
index 937ef0416..369daa411 100644
--- a/man3/bswap.3
+++ b/man3/bswap.3
@@ -29,19 +29,19 @@ bswap_16, bswap_32, bswap_64 \- reverse order of bytes
 .nf
 .B #include <byteswap.h>
 .PP
-.BI bswap_16( x );
-.BI bswap_32( x );
-.BI bswap_64( x );
+.BI "uint16_t bswap_16(uint16_t " x );
+.BI "uint32_t bswap_32(uint32_t " x );
+.BI "uint64_t bswap_64(uint64_t " x );
 .fi
 .SH DESCRIPTION
-These macros return a value in which the order of the bytes
+These functions return a value in which the order of the bytes
 in their 2-, 4-, or 8-byte arguments is reversed.
 .SH RETURN VALUE
-These macros return the value of their argument with the bytes reversed.
+These functions return the value of their argument with the bytes reversed.
 .SH ERRORS
-These macros always succeed.
+These functions always succeed.
 .SH CONFORMING TO
-These macros are GNU extensions.
+These functions are GNU extensions.
 .SH EXAMPLES
 The program below swaps the bytes of the 8-byte integer supplied as
 its command-line argument.