diff --git a/app/static/css/scodoc.css b/app/static/css/scodoc.css
index 95871981..b5eac254 100644
--- a/app/static/css/scodoc.css
+++ b/app/static/css/scodoc.css
@@ -1752,7 +1752,7 @@ div#modimpl_coefs {
 }
 
 .coefs_histo>div {
-  --height: calc(32px * var(--coef) / var(--max));
+  --height: calc(32px * var(--coef) / max(var(--max), 1));
   height: var(--height);
   padding: var(--height) 4px 0 4px;
   background: #09c;