diff --git a/.changeset/heavy-mice-repeat.md b/.changeset/heavy-mice-repeat.md
new file mode 100644
index 00000000000..406b56bba31
--- /dev/null
+++ b/.changeset/heavy-mice-repeat.md
@@ -0,0 +1,5 @@
+---
+"@salt-ds/core": patch
+---
+
+Fixed ToggleButton corner radius when not used within ToggleButtonGroup
diff --git a/packages/core/src/toggle-button-group/ToggleButtonGroup.css b/packages/core/src/toggle-button-group/ToggleButtonGroup.css
index bcb99b9ecb7..b6dc09de6a3 100644
--- a/packages/core/src/toggle-button-group/ToggleButtonGroup.css
+++ b/packages/core/src/toggle-button-group/ToggleButtonGroup.css
@@ -11,6 +11,7 @@
 
 .saltToggleButtonGroup-horizontal .saltToggleButton {
   height: calc(var(--salt-size-base) - var(--salt-spacing-100));
+  border-radius: var(--salt-palette-corner-weaker, 0);
 }
 
 .saltToggleButtonGroup-vertical {
diff --git a/packages/core/src/toggle-button/ToggleButton.css b/packages/core/src/toggle-button/ToggleButton.css
index 112b01753e9..996f7f3a363 100644
--- a/packages/core/src/toggle-button/ToggleButton.css
+++ b/packages/core/src/toggle-button/ToggleButton.css
@@ -8,7 +8,7 @@
   border-color: var(--salt-actionable-secondary-borderColor, transparent);
   border-style: solid;
   border-width: var(--salt-actionable-borderWidth, 0);
-  border-radius: var(--salt-palette-corner-weaker, 0);
+  border-radius: var(--salt-palette-corner-weak, 0);
   height: var(--salt-size-base);
   color: var(--salt-actionable-secondary-foreground);
   text-transform: var(--salt-text-action-textTransform);