diff --git a/libs/main/core/pimemoryblock.h b/libs/main/core/pimemoryblock.h
index 07c1fad0..248a3301 100644
--- a/libs/main/core/pimemoryblock.h
+++ b/libs/main/core/pimemoryblock.h
@@ -74,7 +74,7 @@ public:
 
 private:
 	void * d = nullptr;
-	int s;
+	int s    = 0;
 };
 
 //! \~english Returns PIMemoryBlock from pointer to variable "ptr" with type "T"