diff --git a/report.tex b/report.tex
index 7a0f96f..e849f16 100644
--- a/report.tex
+++ b/report.tex
@@ -325,6 +325,7 @@
 
       \node[fo, below=8mm of bssn] (fobssn) {FOBSSN};
       \node[fo, above=8mm of z4] (gh) {GH};
+      \node[fo, below=8mm of z4] (foz4) {FOZ4};
       \node[fo, below=8mm of ccz4] (foccz4) {FOCCZ4};
 
       \draw[rel] (z4) -- (z4c);
@@ -333,6 +334,7 @@
 
       \draw[rel] (bssn) -- (fobssn);
       \draw[rel] (ccz4) -- (foccz4);
+      \draw[rel] (z4) -- (foz4);
       \draw[equv] (z4) -- (gh);
 
       % \node[draw=none, above=1mm of gh, font=\scriptsize] {full first order};