diff --git a/doc/fix_vector.html b/doc/fix_vector.html
index 9acb53eab8..af0bd770cc 100644
--- a/doc/fix_vector.html
+++ b/doc/fix_vector.html
@@ -53,7 +53,7 @@ For example the velocity auto-correlation function (VACF) can be
 time-integrated, to yield a diffusion coefficient, as follows:
 </P>
 <PRE>compute         2 all vacf
-fix             5 all vector 1 c_2<B>4</B>
+fix             5 all vector 1 c_2[4]
 variable        diff equal dt*trap(f_5)
 thermo_style    custom step v_diff 
 </PRE>
diff --git a/doc/fix_vector.txt b/doc/fix_vector.txt
index 5dd73c4fba..f26d0b4359 100644
--- a/doc/fix_vector.txt
+++ b/doc/fix_vector.txt
@@ -44,7 +44,7 @@ For example the velocity auto-correlation function (VACF) can be
 time-integrated, to yield a diffusion coefficient, as follows:
 
 compute         2 all vacf
-fix             5 all vector 1 c_2[4]
+fix             5 all vector 1 c_2\[4\]
 variable        diff equal dt*trap(f_5)
 thermo_style    custom step v_diff :pre