make install error while installing autoconf 2.50

[_Ke zy_]

I successfully compiled autoconf 2.50, but when I install it I get the 
following error:

make[3]: Entering directory '/home/kez/Programs/autoconf'
makeinfo autoconf-2.50/doc/install.texi --no-headers --no-validate 
--no-split --output=INSTALL.txt
make[3]: makeinfo: Command not found.
*** [INSTALL.txt] Error 127

The autoconf shell script seems to compile fine. When I run ./autoconf 
--version it comes out as 2.50, but if I run autoconf (without the DOT 
FORWARDSLASH) anywhere else, it comes out as 1.13 (the version I am 
upgrading from).

Thanks for your help (needless to say I have searched google, so I'm sorry 
if the solution is obvious),
Kezy

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