diff --git a/preamble_formulas.sty b/preamble_formulas.sty
index 12bd0b6..c7ac005 100644
--- a/preamble_formulas.sty
+++ b/preamble_formulas.sty
@@ -98,7 +98,7 @@
       {SC}{\sta}    % stochastic calculus
       {INLP}{\phy}  % Instabilities and nonlinear phenomena
       {MM}{\sta}    % Montecarlo methods
-      {CO}{\ana}    % Continuous optimization
+      {CO}{\apl}    % Continuous optimization
   }{\col}%
 }
 \ExplSyntaxOff