diff --git a/doc/harp_iset.tex b/doc/harp_iset.tex
index bebdb0e4..cafd2274 100644
--- a/doc/harp_iset.tex
+++ b/doc/harp_iset.tex
@@ -316,10 +316,10 @@ format, which can be fixed point or floating point.
 \texttt{itof} \%dest, \%src&Integer to floating point.\\
 \texttt{ftoi} \%dest, \%src&Floating point to integer.\\
 \texttt{fneg} \%dest, \%src&Negate (complement sign bit).\\
-\texttt{fadd} \%dest, \%src&Floating point add.\\
-\texttt{fsub} \%dest, \%src&Floating point subtract.\\
-\texttt{fmul} \%dest, \%src&Floating point multiply.\\
-\texttt{fdiv} \%dest, \%src&Floating point divide.\\
+\texttt{fadd} \%dest, \%src1, \%src2&Floating point add.\\
+\texttt{fsub} \%dest, \%src1, \%src2&Floating point subtract.\\
+\texttt{fmul} \%dest, \%src1, \%src2&Floating point multiply.\\
+\texttt{fdiv} \%dest, \%src1, \%src2&Floating point divide.\\
 \end{tabular}
 \end{center}