diff --git a/include/libgourou_common.h b/include/libgourou_common.h
index fc701a0..d14b054 100644
--- a/include/libgourou_common.h
+++ b/include/libgourou_common.h
@@ -293,7 +293,7 @@ namespace gourou
      */
     static inline void writeFile(std::string path, ByteArray& data)
     {
-	writeFile(path, data.data(), data.length()-1);
+	writeFile(path, data.data(), data.length());
     }
 
     /**
diff --git a/src/bytearray.cpp b/src/bytearray.cpp
index 11cb21c..08d9c92 100644
--- a/src/bytearray.cpp
+++ b/src/bytearray.cpp
@@ -37,14 +37,14 @@ namespace gourou
     ByteArray::ByteArray(const char* data, int length)
     {
 	if (length == -1)
-	    length = strlen(data) + 1;
+	    length = strlen(data);
 
 	initData((const unsigned char*)data, (unsigned int) length);
     }
     
     ByteArray::ByteArray(const std::string& str)
     {
-	initData((unsigned char*)str.c_str(), (unsigned int)str.length() + 1);
+	initData((unsigned char*)str.c_str(), (unsigned int)str.length());
     }
 
     void ByteArray::initData(const unsigned char* data, unsigned int length)
diff --git a/src/libgourou.cpp b/src/libgourou.cpp
index 4d41649..f336b96 100644
--- a/src/libgourou.cpp
+++ b/src/libgourou.cpp
@@ -907,7 +907,7 @@ namespace gourou
 
 	ByteArray privateLicenseKey = ByteArray::fromBase64(user->getPrivateLicenseKey());
 	/* In adobekey.py, we get base64 decoded data [26:] */
-	write(fd, privateLicenseKey.data()+26, privateLicenseKey.length()-1-26);
+	write(fd, privateLicenseKey.data()+26, privateLicenseKey.length()-26);
 	
 	close(fd);
     }