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-rw-r--r--MdeModulePkg/Universal/CapsulePei/Common/CapsuleCoalesce.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/MdeModulePkg/Universal/CapsulePei/Common/CapsuleCoalesce.c b/MdeModulePkg/Universal/CapsulePei/Common/CapsuleCoalesce.c
index 0428111675..a95b4722c5 100644
--- a/MdeModulePkg/Universal/CapsulePei/Common/CapsuleCoalesce.c
+++ b/MdeModulePkg/Universal/CapsulePei/Common/CapsuleCoalesce.c
@@ -945,7 +945,7 @@ CapsuleDataCoalesce (
DestPtr = FreeMemBase + FreeMemSize - CapsuleSize;
DestPtr = (UINT8 *) ((UINTN) DestPtr &~ (UINTN) (sizeof (UINTN) - 1));
FreeMemBase = (UINT8 *) BlockList + DescriptorsSize;
- FreeMemSize = FreeMemSize - DescriptorsSize - CapsuleSize;
+ FreeMemSize = (UINTN) DestPtr - (UINTN) FreeMemBase;
NewCapsuleBase = (VOID *) DestPtr;
//