diff --git a/opamp_circuits_C_GARRETT/opamps.tex b/opamp_circuits_C_GARRETT/opamps.tex
index 5751f63..de55de2 100644
--- a/opamp_circuits_C_GARRETT/opamps.tex
+++ b/opamp_circuits_C_GARRETT/opamps.tex
@@ -889,7 +889,7 @@ where it will return all the failure modes of the components in {\FG}
 
 given by
 
-$$ fm (FG) = F. $$
+$$ fm ({\FG}) = F. $$
 
 Generally, where $\mathcal{{\FG}}$ is the set of all functional groups,