diff --git a/CHANGELOG.md b/CHANGELOG.md
index c708cf607..6be394b3e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # main
 
+- Fix duplicate "View source" links after client-side navigation in default HTML template
+
 # [0.9.45] - July 14th, 2026
 
 [0.9.45]: https://github.com/lsegal/yard/compare/v0.9.44...v0.9.45
diff --git a/templates/default/fulldoc/html/js/app.js b/templates/default/fulldoc/html/js/app.js
index f84a8c188..a5c877ab5 100644
--- a/templates/default/fulldoc/html/js/app.js
+++ b/templates/default/fulldoc/html/js/app.js
@@ -144,6 +144,9 @@
 
 	function createSourceLinks() {
 		queryAll(".method_details_list .source_code").forEach((sourceCode) => {
+			if (sourceCode.previousElementSibling?.classList.contains("showSource"))
+				return;
+
 			const toggleWrapper = document.createElement("span");
 			const link = document.createElement("a");