diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index e868783dc..539a1cab1 100755
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -9,6 +9,7 @@
 - **Icons** - Fixes some icons that were incorrectly named. **Thanks hammy2899** [#6181](https://github.com/Semantic-Org/Semantic-UI/pull/6181) [#6180](https://github.com/Semantic-Org/Semantic-UI/pull/6180) [#6176](https://github.com/Semantic-Org/Semantic-UI/pull/6176) [#6175](https://github.com/Semantic-Org/Semantic-UI/pull/6175)
 - **Icons** - Increased specifity on `fitted icon` to fix compatibility with other components [#6125](https://github.com/Semantic-Org/Semantic-UI/issues/6125)
 - **Visibility** - Fixed bug that could cause `onScreen` to not work properly for elements that are longer than screen.
+- **CSS Variables** - Added use of `@normal` for normal font weight for all non-default themes included in repo. #6227
 
 **Docs**
 - Fixes CDN links in docs **Thanks @KSH-code**
diff --git a/src/themes/basic/elements/button.variables b/src/themes/basic/elements/button.variables
index a3d1ebd29..d09cb46eb 100644
--- a/src/themes/basic/elements/button.variables
+++ b/src/themes/basic/elements/button.variables
@@ -4,7 +4,7 @@
 
 /* Button Variables */
 @textTransform: none;
-@fontWeight: normal;
+@fontWeight: @normal;
 @textColor: #333333;
 
 @primaryColor: #333333;
diff --git a/src/themes/basic/modules/progress.variables b/src/themes/basic/modules/progress.variables
index 536e36548..a0622b9e0 100644
--- a/src/themes/basic/modules/progress.variables
+++ b/src/themes/basic/modules/progress.variables
@@ -10,6 +10,6 @@
 @progressWidth: 100%;
 @progressTextAlign: center;
 
-@labelFontWeight: normal;
+@labelFontWeight: @normal;
 @labelTextAlign: left;
-@labelHeight: 1.5em;
\ No newline at end of file
+@labelHeight: 1.5em;
diff --git a/src/themes/bookish/elements/header.variables b/src/themes/bookish/elements/header.variables
index 412daadda..3979b74c1 100644
--- a/src/themes/bookish/elements/header.variables
+++ b/src/themes/bookish/elements/header.variables
@@ -3,7 +3,7 @@
 --------------------*/
 
 @headerFont : 'Karma', 'Times New Roman', serif;
-@fontWeight: normal;
+@fontWeight: @normal;
 
 @iconSize: 1.5em;
 @iconOffset: 0.2em;
@@ -34,4 +34,4 @@
 @largeFontSize: 1.33em;
 @mediumFontSize: 1.33em;
 @smallFontSize: 1em;
-@tinyFontSize: 0.9em;
\ No newline at end of file
+@tinyFontSize: 0.9em;
diff --git a/src/themes/bootstrap3/elements/button.variables b/src/themes/bootstrap3/elements/button.variables
index 376cb49b8..7ceaa3feb 100644
--- a/src/themes/bootstrap3/elements/button.variables
+++ b/src/themes/bootstrap3/elements/button.variables
@@ -5,7 +5,7 @@
 /* Button Variables */
 @pageFont: Helvetica Neue, Helvetica, Arial, sans-serif;
 @textTransform: none;
-@fontWeight: normal;
+@fontWeight: @normal;
 @textColor: rgba(51, 51, 51, 1);
 
 @borderRadius: @4px;
@@ -60,4 +60,4 @@
 
 @activeBackgroundColor: #E6E6E6;
 
-@disabledOpacity: 0.65;
\ No newline at end of file
+@disabledOpacity: 0.65;
diff --git a/src/themes/chubby/elements/button.variables b/src/themes/chubby/elements/button.variables
index 03ed2f8ed..ae92b9a19 100644
--- a/src/themes/chubby/elements/button.variables
+++ b/src/themes/chubby/elements/button.variables
@@ -6,7 +6,7 @@
 @pageFont: 'Source Sans Pro', Arial, sans-serif;
 
 @textTransform: none;
-@fontWeight: normal;
+@fontWeight: @normal;
 @textColor: #333333;
 
 @verticalPadding: 1.1em;