3 files changed, 3 insertions, 3 deletions
diff --git a/src/librustdoc/html/static/css/themes/ayu.css b/src/librustdoc/html/static/css/themes/ayu.css
index 0fb4f95acdf..0fd6462a8f5 100644
--- a/src/librustdoc/html/static/css/themes/ayu.css
+++ b/src/librustdoc/html/static/css/themes/ayu.css
@@ -136,7 +136,7 @@ pre, .rustdoc.source .example-wrap {
 	border-right: 1px solid #ffb44c;
 }
 
-.docblock h2, .docblock h3, .docblock h4, .docblock h5, .docblock h6 {
+.docblock h1, .docblock h2, .docblock h3, .docblock h4, .docblock h5, .docblock h6 {
 	border-bottom-color: #5c6773;
 }
 
diff --git a/src/librustdoc/html/static/css/themes/dark.css b/src/librustdoc/html/static/css/themes/dark.css
index 4fb6f7b38bb..d863701dd73 100644
--- a/src/librustdoc/html/static/css/themes/dark.css
+++ b/src/librustdoc/html/static/css/themes/dark.css
@@ -93,7 +93,7 @@ pre, .rustdoc.source .example-wrap {
 	background-color: #0a042f !important;
 }
 
-.docblock h2, .docblock h3, .docblock h4, .docblock h5, .docblock h6 {
+.docblock h1, .docblock h2, .docblock h3, .docblock h4, .docblock h5, .docblock h6 {
 	border-bottom-color: #DDD;
 }
 
diff --git a/src/librustdoc/html/static/css/themes/light.css b/src/librustdoc/html/static/css/themes/light.css
index 62134f025c8..28d2e99a3d0 100644
--- a/src/librustdoc/html/static/css/themes/light.css
+++ b/src/librustdoc/html/static/css/themes/light.css
@@ -93,7 +93,7 @@ pre, .rustdoc.source .example-wrap {
 	background-color: #f6fdb0 !important;
 }
 
-.docblock h2, .docblock h3, .docblock h4, .docblock h5, .docblock h6 {
+.docblock h1, .docblock h2, .docblock h3, .docblock h4, .docblock h5, .docblock h6 {
 	border-bottom-color: #ddd;
 }