diff --git a/src/libqof/qof/gnc-rational.cpp b/src/libqof/qof/gnc-rational.cpp
index e78ed6e183..c00cfabfa7 100644
--- a/src/libqof/qof/gnc-rational.cpp
+++ b/src/libqof/qof/gnc-rational.cpp
@@ -24,6 +24,17 @@
 #include "gnc-rational.hpp"
 #include "gnc-numeric.hpp"
 
+
+GncRational::GncRational(GncNumeric n) noexcept :
+    m_num(n.num()), m_den(n.denom()), m_error(GNC_ERROR_OK)
+{
+    if (m_den.isNeg())
+    {
+        m_num *= -m_den;
+        m_den = 1;
+    }
+}
+
 GncRational::GncRational (gnc_numeric n) noexcept :
     m_num (n.num), m_den (n.denom), m_error {GNC_ERROR_OK}
 {
diff --git a/src/libqof/qof/gnc-rational.hpp b/src/libqof/qof/gnc-rational.hpp
index b6667e674d..0ae3fee03d 100644
--- a/src/libqof/qof/gnc-rational.hpp
+++ b/src/libqof/qof/gnc-rational.hpp
@@ -39,10 +39,14 @@ class GncRational
 public:
     GncRational() : m_num(0), m_den(1), m_error(GNC_ERROR_OK) {}
     GncRational (gnc_numeric n) noexcept;
+    GncRational(GncNumeric n) noexcept;
     GncRational (GncInt128 num, GncInt128 den,
                  GNCNumericErrorCode err=GNC_ERROR_OK) noexcept
         : m_num(num), m_den(den), m_error(err) {}
-
+    GncRational(const GncRational& rhs) = default;
+    GncRational(GncRational&& rhs) = default;
+    GncRational& operator=(const GncRational& rhs) = default;
+    GncRational& operator=(GncRational&& rhs) = default;
 /** Conversion operator; use static_cast<gnc_numeric>(foo). */
     operator gnc_numeric() const noexcept;
 /** Make a new GncRational with the opposite sign. */