diff --git a/SecurityPkg/Library/Tpm2CommandLib/Tpm2Object.c b/SecurityPkg/Library/Tpm2CommandLib/Tpm2Object.c
index 335957d6ce..888979e969 100644
--- a/SecurityPkg/Library/Tpm2CommandLib/Tpm2Object.c
+++ b/SecurityPkg/Library/Tpm2CommandLib/Tpm2Object.c
@@ -252,7 +252,7 @@ Tpm2ReadPublic (
 
       OutPublic->publicArea.parameters.rsaDetail.keyBits  = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
       Buffer                                             += sizeof (UINT16);
-      OutPublic->publicArea.parameters.rsaDetail.exponent = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
+      OutPublic->publicArea.parameters.rsaDetail.exponent = SwapBytes32 (ReadUnaligned32 ((UINT32 *)Buffer));
       Buffer                                             += sizeof (UINT32);
       break;
     case TPM_ALG_ECC: