diff --git a/poppler/DecryptStream.cc b/poppler/DecryptStream.cc
index 38df14a7c254b1015c5a7942e5b65a734d5f72c5..592800f6e244fc347416a437b8e74fd05ae39aee 100644
--- a/poppler/DecryptStream.cc
+++ b/poppler/DecryptStream.cc
@@ -130,8 +130,8 @@ void aesEncryptArray(const unsigned char *IV,
 //------------------------------------------------------------------------
 
 EncryptStream::EncryptStream(Stream *strA, const unsigned char *fileKey, CryptAlgorithm algoA,
-			     int keyLength, int objNum, int objGen):
-  BaseCryptStream(strA, fileKey, algoA, keyLength, objNum, objGen)
+			     int keyLength, Ref refA):
+  BaseCryptStream(strA, fileKey, algoA, keyLength, refA)
 {
   // Fill the CBC initialization vector for AES and AES-256
   switch (algo) {
@@ -222,8 +222,8 @@ int EncryptStream::lookChar() {
 //------------------------------------------------------------------------
 
 DecryptStream::DecryptStream(Stream *strA, const unsigned char *fileKey, CryptAlgorithm algoA,
-			     int keyLength, int objNum, int objGen):
-  BaseCryptStream(strA, fileKey, algoA, keyLength, objNum, objGen)
+			     int keyLength, Ref refA):
+  BaseCryptStream(strA, fileKey, algoA, keyLength, refA)
 {
 }
 
diff --git a/poppler/DecryptStream.h b/poppler/DecryptStream.h
index 018030dd1dbd156d7595f29e1f58c176299e32fb..90ba0b8a007ac91e67d6d78a757387a2995ace7d 100644
--- a/poppler/DecryptStream.h
+++ b/poppler/DecryptStream.h
@@ -101,7 +101,7 @@ class EncryptStream : public BaseCryptStream {
 public:
 
   EncryptStream(Stream *strA, const unsigned char *fileKey, CryptAlgorithm algoA,
-                int keyLength, int objNum, int objGen);
+                int keyLength, Ref ref);
   ~EncryptStream();
   void reset() override;
   int lookChar() override;
@@ -119,7 +119,7 @@ class DecryptStream : public BaseCryptStream {
 public:
 
   DecryptStream(Stream *strA, const unsigned char *fileKey, CryptAlgorithm algoA,
-                int keyLength, int objNum, int objGen);
+                int keyLength, Ref ref);
   ~DecryptStream();
   void reset() override;
   int lookChar() override;
diff --git a/poppler/DecryptStreamNSS.cc b/poppler/DecryptStreamNSS.cc
index e8c4bf98a68200a4cfc471e4ebff6a5be51d472e..049bb4b05e3e2aa3a05b420f6ddd36e6962ea102 100644
--- a/poppler/DecryptStreamNSS.cc
+++ b/poppler/DecryptStreamNSS.cc
@@ -107,8 +107,8 @@ void aesEncryptArray(const unsigned char *IV,
 //------------------------------------------------------------------------
 
 EncryptStream::EncryptStream(Stream *strA, const unsigned char *fileKey, CryptAlgorithm algoA,
-                             int keyLength, int objNum, int objGen):
-  BaseCryptStream(strA, fileKey, algoA, keyLength, objNum, objGen)
+                             int keyLength, Ref refA):
+  BaseCryptStream(strA, fileKey, algoA, keyLength, refA)
 {
   // Fill the CBC initialization vector for AES and AES-256
   if (algo == cryptAES || algo == cryptAES256)
@@ -207,8 +207,8 @@ int EncryptStream::lookChar() {
 //------------------------------------------------------------------------
 
 DecryptStream::DecryptStream(Stream *strA, const unsigned char *fileKey, CryptAlgorithm algoA,
-                             int keyLength, int objNum, int objGen):
-  BaseCryptStream(strA, fileKey, algoA, keyLength, objNum, objGen)
+                             int keyLength, Ref refA):
+  BaseCryptStream(strA, fileKey, algoA, keyLength, refA)
 {
   switch (algo) {
     case cryptRC4:
diff --git a/poppler/DecryptStreamNSS.h b/poppler/DecryptStreamNSS.h
index 94d60d2cb9faaac91343e5d850da1415bc0352de..9731901382ff10396a486cfafccd9709132ea12e 100644
--- a/poppler/DecryptStreamNSS.h
+++ b/poppler/DecryptStreamNSS.h
@@ -95,7 +95,7 @@ class EncryptStream : public BaseCryptStream {
 public:
 
   EncryptStream(Stream *strA, const unsigned char *fileKey, CryptAlgorithm algoA,
-                int keyLength, int objNum, int objGen);
+                int keyLength, Ref ref);
   ~EncryptStream();
   void reset() override;
   int lookChar() override;
@@ -112,7 +112,7 @@ class DecryptStream : public BaseCryptStream {
 public:
 
   DecryptStream(Stream *strA, const unsigned char *fileKey, CryptAlgorithm algoA,
-                int keyLength, int objNum, int objGen);
+                int keyLength, Ref ref);
   ~DecryptStream();
   void reset() override;
   int lookChar() override;