diff --git a/libs/main/core/pimemoryblock.h b/libs/main/core/pimemoryblock.h
index ad98c4e1..07c1fad0 100644
--- a/libs/main/core/pimemoryblock.h
+++ b/libs/main/core/pimemoryblock.h
@@ -73,7 +73,7 @@ public:
 	bool isNull() const { return d; }
 
 private:
-	void * d;
+	void * d = nullptr;
 	int s;
 };