diff --git a/include/xrpl/protocol/MPTAmount.h b/include/xrpl/protocol/MPTAmount.h
index af14786501..1c7c7a25e7 100644
--- a/include/xrpl/protocol/MPTAmount.h
+++ b/include/xrpl/protocol/MPTAmount.h
@@ -64,7 +64,7 @@ public:
 
     operator Number() const noexcept
     {
-        return value();
+        return {value(), Number::strong};
     }
 
     /** Return the sign of the amount */
diff --git a/include/xrpl/protocol/XRPAmount.h b/include/xrpl/protocol/XRPAmount.h
index e102a3707f..f26bb7366f 100644
--- a/include/xrpl/protocol/XRPAmount.h
+++ b/include/xrpl/protocol/XRPAmount.h
@@ -143,7 +143,7 @@ public:
 
     operator Number() const noexcept
     {
-        return drops();
+        return {drops(), Number::weak};
     }
 
     /** Return the sign of the amount */