diff --git a/CHANGES b/CHANGES
index 4afa807b69e..547533a9bf1 100644
--- a/CHANGES
+++ b/CHANGES
@@ -16,6 +16,8 @@ Features added
 Bugs fixed
 ----------
 
+* #10594: HTML Theme: field term colons are doubled if using Docutils 0.18+
+
 Testing
 --------
 
diff --git a/sphinx/themes/basic/static/basic.css_t b/sphinx/themes/basic/static/basic.css_t
index d8f3fe74626..47f802dc4e7 100644
--- a/sphinx/themes/basic/static/basic.css_t
+++ b/sphinx/themes/basic/static/basic.css_t
@@ -686,9 +686,11 @@ dl.field-list > dt {
     padding-right: 5px;
 }
 
+{%- if docutils_version_info[:2] < (0, 18) %}
 dl.field-list > dt:after {
     content: ":";
 }
+{% endif %}
 
 dl.field-list > dd {
     padding-left: 0.5em;