diff --git a/libwvdrmengine/docs/WidevineModularDRMSecurityIntegrationGuideforCENC.pdf b/libwvdrmengine/docs/WidevineModularDRMSecurityIntegrationGuideforCENC.pdf
index b10d92ad..88ba3aba 100644
Binary files a/libwvdrmengine/docs/WidevineModularDRMSecurityIntegrationGuideforCENC.pdf and b/libwvdrmengine/docs/WidevineModularDRMSecurityIntegrationGuideforCENC.pdf differ
diff --git a/libwvdrmengine/oemcrypto/include/OEMCryptoCENC.h b/libwvdrmengine/oemcrypto/include/OEMCryptoCENC.h
index b92797dc..1dd964b6 100644
--- a/libwvdrmengine/oemcrypto/include/OEMCryptoCENC.h
+++ b/libwvdrmengine/oemcrypto/include/OEMCryptoCENC.h
@@ -243,7 +243,7 @@ typedef enum OEMCrypto_HDCP_Capability {
   HDCP_V1    = 1,  // HDCP version 1.0
   HDCP_V2    = 2,  // HDCP version 2.0
   HDCP_V2_1  = 3,  // HDCP version 2.1
-  HDCP_V2_2  = 4,  // HDCP version 2.2
+  HDCP_V2_2  = 4,  // HDCP version 2.2 Type 1.
   HDCP_NO_DIGITAL_OUTPUT = 0xff  // No digital output.
 } OEMCrypto_HDCP_Capability;