diff --git a/hc128.cpp b/hc128.cpp
index 0d0fb14c..19b4a3db 100644
--- a/hc128.cpp
+++ b/hc128.cpp
@@ -224,7 +224,7 @@ void HC128Policy::OperateKeystream(KeystreamOperation operation, byte *output, c
 		PutWord(false, LITTLE_ENDIAN_ORDER, output + 56, keystream[14]);
 		PutWord(false, LITTLE_ENDIAN_ORDER, output + 60, keystream[15]);
 
-		// If AdditiveCipherTemplate does not have an acculated keystream
+		// If AdditiveCipherTemplate does not have an accumulated keystream
 		//  then it will ask OperateKeystream to XOR the plaintext with
 		//  the keystream and write it to the ciphertext buffer.
 		if ((operation & INPUT_NULL) != INPUT_NULL)
diff --git a/hc256.cpp b/hc256.cpp
index c0bf48cc..d77b5d45 100644
--- a/hc256.cpp
+++ b/hc256.cpp
@@ -99,7 +99,7 @@ void HC256Policy::OperateKeystream(KeystreamOperation operation, byte *output, c
 	for (unsigned int i = 0; i < (msglen >> 2); i++, in += 4, out += 4)
 		PutWord(false, LITTLE_ENDIAN_ORDER, out, Generate());
 
-	// If AdditiveCipherTemplate does not have an acculated keystream
+	// If AdditiveCipherTemplate does not have an accumulated keystream
 	//  then it will ask OperateKeystream to XOR the plaintext with
 	//  the keystream and write it to the ciphertext buffer.
 	if ((operation & INPUT_NULL) != INPUT_NULL)
diff --git a/rabbit.cpp b/rabbit.cpp
index f7d9d3b0..505f07ac 100644
--- a/rabbit.cpp
+++ b/rabbit.cpp
@@ -139,7 +139,7 @@ void RabbitPolicy::OperateKeystream(KeystreamOperation operation, byte *output,
 		PutWord(false, LITTLE_ENDIAN_ORDER, output +  8, m_wx[4] ^ (m_wx[1] >> 16) ^ (m_wx[7] << 16));
 		PutWord(false, LITTLE_ENDIAN_ORDER, output + 12, m_wx[6] ^ (m_wx[3] >> 16) ^ (m_wx[1] << 16));
 
-		// If AdditiveCipherTemplate does not have an acculated keystream
+		// If AdditiveCipherTemplate does not have an accumulated keystream
 		//  then it will ask OperateKeystream to XOR the plaintext with
 		//  the keystream and write it to the ciphertext buffer.
 		if ((operation & INPUT_NULL) != INPUT_NULL)
@@ -243,7 +243,7 @@ void RabbitWithIVPolicy::OperateKeystream(KeystreamOperation operation, byte *ou
 		PutWord(false, LITTLE_ENDIAN_ORDER, output + 8, m_wx[4] ^ (m_wx[1] >> 16) ^ (m_wx[7] << 16));
 		PutWord(false, LITTLE_ENDIAN_ORDER, output + 12, m_wx[6] ^ (m_wx[3] >> 16) ^ (m_wx[1] << 16));
 
-		// If AdditiveCipherTemplate does not have an acculated keystream
+		// If AdditiveCipherTemplate does not have an accumulated keystream
 		//  then it will ask OperateKeystream to XOR the plaintext with
 		//  the keystream and write it to the ciphertext buffer.
 		if ((operation & INPUT_NULL) != INPUT_NULL)