diff --git a/doc/platform.texi b/doc/platform.texi
index 73b73fb490..705a68006f 100644
--- a/doc/platform.texi
+++ b/doc/platform.texi
@@ -137,8 +137,6 @@ You will need the following prerequisites:
 @item @uref{http://msys2.github.io/, MSYS2}
 @item @uref{http://yasm.tortall.net/, YASM}
 (Also available via MSYS2's package manager.)
-@item @uref{http://gnuwin32.sourceforge.net/packages/bc.htm, bc for Windows} if
-you want to run @uref{fate.html, FATE}.
 @end itemize
 
 To set up a proper environment in MSYS2, you need to run @code{msys_shell.bat} from
@@ -285,7 +283,7 @@ binutils, gcc4-core, make, git, mingw-runtime, texinfo
 
 In order to run FATE you will also need the following "Utils" packages:
 @example
-bc, diffutils
+diffutils
 @end example
 
 If you want to build FFmpeg with additional libraries, download Cygwin
diff --git a/tests/fate-run.sh b/tests/fate-run.sh
index c7b2922799..824d5f48d1 100755
--- a/tests/fate-run.sh
+++ b/tests/fate-run.sh
@@ -38,7 +38,7 @@ target_path(){
 # $1=value1, $2=value2, $3=threshold
 # prints 0 if absolute difference between value1 and value2 is <= threshold
 compare(){
-    awk "BEGIN { v=$1-$2; printf ((v<0?-v:v) > $3) }"
+    awk "BEGIN { v = $1 - $2; printf ((v < 0 ? -v : v) > $3) }"
 }
 
 do_tiny_psnr(){