diff --git a/Cryptlib/Pk/CryptPkcs7Verify.c b/Cryptlib/Pk/CryptPkcs7Verify.c
index efa3796..4dd1625 100644
--- a/Cryptlib/Pk/CryptPkcs7Verify.c
+++ b/Cryptlib/Pk/CryptPkcs7Verify.c
@@ -238,10 +238,10 @@ _Exit:
   @param[in]  P7Data       Pointer to the PKCS#7 message to verify.
   @param[in]  P7Length     Length of the PKCS#7 message in bytes.
   @param[out] CertStack    Pointer to Signer's certificates retrieved from P7Data.
-                           It's caller's responsiblity to free the buffer.
+                           It's caller's responsibility to free the buffer.
   @param[out] StackLength  Length of signer's certificates in bytes.
   @param[out] TrustedCert  Pointer to a trusted certificate from Signer's certificates.
-                           It's caller's responsiblity to free the buffer.
+                           It's caller's responsibility to free the buffer.
   @param[out] CertLength   Length of the trusted certificate in bytes.
 
   @retval  TRUE            The operation is finished successfully.
@@ -436,10 +436,10 @@ Pkcs7FreeSigners (
   @param[in]  P7Data            Pointer to the PKCS#7 message.
   @param[in]  P7Length          Length of the PKCS#7 message in bytes.
   @param[out] SignerChainCerts  Pointer to the certificates list chained to signer's
-                                certificate. It's caller's responsiblity to free the buffer.
+                                certificate. It's caller's responsibility to free the buffer.
   @param[out] ChainLength       Length of the chained certificates list buffer in bytes.
   @param[out] UnchainCerts      Pointer to the unchained certificates lists. It's caller's
-                                responsiblity to free the buffer.
+                                responsibility to free the buffer.
   @param[out] UnchainLength     Length of the unchained certificates list buffer in bytes.
 
   @retval  TRUE         The operation is finished successfully.
@@ -905,7 +905,7 @@ _Exit:
   @param[in]   P7Data       Pointer to the PKCS#7 signed data to process.
   @param[in]   P7Length     Length of the PKCS#7 signed data in bytes.
   @param[out]  Content      Pointer to the extracted content from the PKCS#7 signedData.
-                            It's caller's responsiblity to free the buffer.
+                            It's caller's responsibility to free the buffer.
   @param[out]  ContentSize  The size of the extracted content in bytes.
 
   @retval     TRUE          The P7Data was correctly formatted for processing.