diff --git a/modules/database/src/std/link/links.dbd.pod b/modules/database/src/std/link/links.dbd.pod
index 5247f6950..9a3f7b9c7 100644
--- a/modules/database/src/std/link/links.dbd.pod
+++ b/modules/database/src/std/link/links.dbd.pod
@@ -81,7 +81,7 @@ link(calc, lnkCalcIf)
 =head3 Calculation Link C<"calc">
 
 A calculation link is an input link that can evaluate mathematical expressions
-on scalar (double-precision floating-point) values obtained from up to 12 child
+on scalar (double-precision floating-point) values obtained from up to 21 child
 input links, and returns a double-precision floating-point result. The
 expression is evaluated by the EPICS Calc engine, and the result is returned as
 the value of the link.
@@ -95,7 +95,7 @@ record will be placed in C<LINK/MAJOR> alarm. If not and the C<minor> expression
 evaluates to non-zero the record will be placed in C<LINK/MINOR> alarm state.
 
 A calculation link can also be an output link, with the scalar output value
-being converted to a double and provided to the expression as C<VAL>. Up to 12
+being converted to a double and provided to the expression as C<VAL>. Up to 21
 additional input links can also be read and provided to the expression as above.
 The result of the calculation is forwarded to a child output link specified in
 the link's C<out> parameter.
@@ -127,7 +127,7 @@ An optional expression that returns non-zero to raise a minor alarm.
 =item args
 
 A JSON list of up to 12 input arguments for the expression, which are assigned
-to the inputs C<A>, C<B>, C<C>, ... C<L>. Each input argument may be either a
+to the inputs C<A>, C<B>, C<C>, ... C<U>. Each input argument may be either a
 numeric literal or an embedded JSON link inside C<{}> braces. The same input
 values are provided to the two alarm expressions as to the primary expression.
 
@@ -149,7 +149,7 @@ result should be displayed. Equivalent to the C<PREC> field of a record.
 
 =item time
 
-An optional string containing a single upper or lower-case letter C<A> ... C<L>
+An optional string containing a single upper or lower-case letter C<A> ... C<U>
 which must correspond to an input provided in the C<args> parameter. When the
 record containing such a link has C<TSEL> set to -2 (epicsTimeEventDeviceTime)
 the record's timestamp field C<TIME> will be read from the indicated input link