diff --git a/include/common.h b/include/common.h
index 77b74f9..45a2c7c 100644
--- a/include/common.h
+++ b/include/common.h
@@ -22,7 +22,7 @@ class EXPORT ObjectBase
 protected:
 // No save by default
 virtual const int8_t* Blob(size_t* size) const { *size=0; return 0; }
-virtual void DeallocBlob(const void* ptr) const {};
+virtual void DeallocBlob(const int8_t* ptr) const {};
 public:
 
  ObjectBase() = default;