diff --git a/components/modal/style/index.tsx b/components/modal/style/index.tsx
index 350bad8d40..e2c9ee44cb 100644
--- a/components/modal/style/index.tsx
+++ b/components/modal/style/index.tsx
@@ -297,6 +297,7 @@ const genModalConfirmStyle: GenerateStyle<ModalToken> = (token) => {
 
           [`+ ${confirmComponentCls}-content`]: {
             marginBlockStart: token.marginXS,
+            flexBasis: "100%",
           },
         },
 
@@ -317,7 +318,6 @@ const genModalConfirmStyle: GenerateStyle<ModalToken> = (token) => {
           // `content` after `icon` should set marginLeft
           [`+ ${confirmComponentCls}-title + ${confirmComponentCls}-content`]: {
             marginInlineStart: token.modalConfirmIconSize + token.marginSM,
-            flexBasis: '100%',
           },
         },
       },