Fix o3tl::saturating_add for negative b

Change-Id: I665f6c2f94b6c03d6fb5136fff3054ad6f0ca962

1 files changed, 2 insertions, 2 deletions

diff --git a/include/o3tl/safeint.hxx b/include/o3tl/safeint.hxx
index 8b735fe2edfa..47baccf067f8 100644
--- a/include/o3tl/safeint.hxx
+++ b/include/o3tl/safeint.hxx
@@ -37,8 +37,8 @@ typename std::enable_if<std::is_signed<T>::value, T>::type saturating_add(
             return std::numeric_limits<T>::max();
         }
     } else {
-        if (a >= std::numeric_limits<T>::min() + b) {
-            return a - b;
+        if (a >= std::numeric_limits<T>::min() - b) {
+            return a + b;
         } else {
             return std::numeric_limits<T>::min();
         }