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-rw-r--r--MdeModulePkg/Universal/SetupBrowserDxe/Presentation.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/MdeModulePkg/Universal/SetupBrowserDxe/Presentation.c b/MdeModulePkg/Universal/SetupBrowserDxe/Presentation.c
index a1367574b0..0671558b57 100644
--- a/MdeModulePkg/Universal/SetupBrowserDxe/Presentation.c
+++ b/MdeModulePkg/Universal/SetupBrowserDxe/Presentation.c
@@ -231,8 +231,8 @@ DisplayPageFrame (
Alignment < BANNER_COLUMNS + (UINT8) LocalScreen.LeftColumn;
Alignment++
) {
- RowIdx = Line - (UINT8) LocalScreen.TopRow;
- ColumnIdx = Alignment - (UINT8) LocalScreen.LeftColumn;
+ RowIdx = (UINT8) (Line - (UINT8) LocalScreen.TopRow);
+ ColumnIdx = (UINT8) (Alignment - (UINT8) LocalScreen.LeftColumn);
ASSERT (RowIdx < BANNER_HEIGHT);
ASSERT (ColumnIdx < BANNER_COLUMNS);