diff --git a/packages/core/src/themes/normalize.scss b/packages/core/src/themes/normalize.scss
index 8ff4b23756..e0d9416d7a 100644
--- a/packages/core/src/themes/normalize.scss
+++ b/packages/core/src/themes/normalize.scss
@@ -162,6 +162,7 @@ button ion-label {
 
 button {
   border: 0;
+  border-radius: 0;
   font-family: inherit;
   font-style: inherit;
   font-variant: inherit;