diff --git a/latex/NEMO/subfiles/chap_DYN.tex b/latex/NEMO/subfiles/chap_DYN.tex
index ea8a6afb18817e0763f9280db2edb9d72793808b..292fdc550f8f56fda184b1a941bbceabd340722a 100644
--- a/latex/NEMO/subfiles/chap_DYN.tex
+++ b/latex/NEMO/subfiles/chap_DYN.tex
@@ -78,7 +78,7 @@ The evolution of sea surface height ($\eta$) and vertical velocity ($w$) in ocea
 is fundamentally governed by the continuity equation, which ensures the conservation of volume.
 Through this equation, we derive expressions for $\eta$ and $w$ that are essential for maintaining
 the balance between horizontal and vertical transport in the ocean’s volume-conserving framework.
-Both are deduced from the horizontal divergence $\ksi$ and require the horizontal divergence calculation. 
+Both are deduced from the horizontal divergence $\chi$ and require the horizontal divergence calculation. 
 Because $\eta$ evolution is related to the external mode it is described in \autoref{chap:D2D} 
 while $w$ evolution is described here after.