diff --git a/report.tex b/report.tex
index e849f16..48de47e 100644
--- a/report.tex
+++ b/report.tex
@@ -327,6 +327,7 @@
       \node[fo, above=8mm of z4] (gh) {GH};
       \node[fo, below=8mm of z4] (foz4) {FOZ4};
       \node[fo, below=8mm of ccz4] (foccz4) {FOCCZ4};
+      \node[below=8mm of z4c] (foz4c) {?};
 
       \draw[rel] (z4) -- (z4c);
       \draw[rel] (z4) to[bend left=18] (ccz4);