diff --git a/drm/libmediadrm/CryptoHal.cpp b/drm/libmediadrm/CryptoHal.cpp
index 4dda5d7..d62ccd6 100644
--- a/drm/libmediadrm/CryptoHal.cpp
+++ b/drm/libmediadrm/CryptoHal.cpp
@@ -301,7 +301,7 @@
     ssize_t offset;
     size_t size;
 
-    if (memory == NULL && buffer == NULL) {
+    if (memory == NULL || buffer == NULL) {
         return UNEXPECTED_NULL;
     }