diff --git a/src/App/AutoTransaction.h b/src/App/AutoTransaction.h
index c50435baf3..6f75d752b3 100644
--- a/src/App/AutoTransaction.h
+++ b/src/App/AutoTransaction.h
@@ -31,9 +31,7 @@ class Application;
 class AppExport AutoTransaction {
 private:
     /// Private new operator to prevent heap allocation
-    void* operator new(size_t size) {
-        return nullptr;
-    };
+    void* operator new(size_t size);
 
 public:
     /** Constructor
@@ -122,9 +120,7 @@ public:
 
 private:
     /// Private new operator to prevent heap allocation
-    void* operator new(size_t size) {
-        return nullptr;
-    };
+    void* operator new(size_t size);
 
 private:
     bool active;