diff --git a/src/ripple/app/tests/Offer.test.cpp b/src/ripple/app/tests/Offer.test.cpp
index ec6044a02..36167cb8b 100644
--- a/src/ripple/app/tests/Offer.test.cpp
+++ b/src/ripple/app/tests/Offer.test.cpp
@@ -153,7 +153,7 @@ public:
         {
             auto const closeTime = STAmountSO::soTime + timeDelta;
             env.close (closeTime);
-            *stAmountCalcSwitchover = closeTime <= STAmountSO::soTime;
+            *stAmountCalcSwitchover = closeTime > STAmountSO::soTime;
             // Will fail without the underflow fix
             auto expectedResult = *stAmountCalcSwitchover ?
                 tesSUCCESS : tecPATH_PARTIAL;
diff --git a/src/ripple/protocol/STAmount.h b/src/ripple/protocol/STAmount.h
index 9c4d01340..e9d2e8a54 100644
--- a/src/ripple/protocol/STAmount.h
+++ b/src/ripple/protocol/STAmount.h
@@ -410,7 +410,7 @@ public:
     explicit STAmountSO(NetClock::time_point const closeTime)
         : saved_(*stAmountCalcSwitchover)
     {
-        *stAmountCalcSwitchover = closeTime <= soTime;
+        *stAmountCalcSwitchover = closeTime > soTime;
     }
 
     ~STAmountSO()