diff --git a/core/fdrm/fx_crypt_sha.cpp b/core/fdrm/fx_crypt_sha.cpp
index 649b05d..6c3b369 100644
--- a/core/fdrm/fx_crypt_sha.cpp
+++ b/core/fdrm/fx_crypt_sha.cpp
@@ -549,7 +549,7 @@
 
 void CRYPT_SHA384Generate(const uint8_t* data,
                           uint32_t size,
-                          uint8_t digest[64]) {
+                          uint8_t digest[48]) {
   CRYPT_sha2_context context;
   CRYPT_SHA384Start(&context);
   CRYPT_SHA384Update(&context, data, size);