diff --git a/core/jni/android_os_HwBlob.cpp b/core/jni/android_os_HwBlob.cpp
index bb916d2..09589cdb 100644
--- a/core/jni/android_os_HwBlob.cpp
+++ b/core/jni/android_os_HwBlob.cpp
@@ -85,7 +85,7 @@
       mOwnsBuffer(true),
       mHandle(0) {
     if (size > 0) {
-        mBuffer = malloc(size);
+        mBuffer = calloc(size, 1);
     }
 }