bugfix undefined border color variable for btn

diff --git a/scss/_buttons.scss b/scss/_buttons.scss
index 044b8d6f5f493f0ed6618c58f1027ac013a8e8d1..30f435c0190a56f674979690d24d09c58b942c43 100644 (file)
--- a/scss/_buttons.scss
+++ b/scss/_buttons.scss
@@ -15,6 +15,7 @@
   --#{$prefix}btn-border-width: #{$btn-border-width};
   --#{$prefix}btn-border-color: transparent;
   --#{$prefix}btn-border-radius: #{$btn-border-radius};
+  --#{$prefix}btn-hover-border-color: transparent;
   --#{$prefix}btn-box-shadow: #{$btn-box-shadow};
   --#{$prefix}btn-disabled-opacity: #{$btn-disabled-opacity};
   --#{$prefix}btn-focus-box-shadow: 0 0 0 #{$btn-focus-width} rgba(var(--#{$prefix}btn-focus-shadow-rgb), .5);