diff --git a/include/TFEL/Math/Matrix/tmatrix.ixx b/include/TFEL/Math/Matrix/tmatrix.ixx
index 4c1842e89..e64783d1c 100644
--- a/include/TFEL/Math/Matrix/tmatrix.ixx
+++ b/include/TFEL/Math/Matrix/tmatrix.ixx
@@ -502,7 +502,7 @@ namespace tfel::math {
         tfel::math::internals::DerivativeViewFromTinyMatrixImplementation<
             isScalar<FunctionType>(), isScalar<VariableType>(), FunctionType,
             VariableType>;
-    return Implementation::template exe(m, i, j);
+    return Implementation::exe(m, i, j);
   }  // end of map_derivative
 
 }  // namespace tfel::math
diff --git a/include/TFEL/System/ThreadedTaskResult.ixx b/include/TFEL/System/ThreadedTaskResult.ixx
index 4a020b645..16b447db4 100644
--- a/include/TFEL/System/ThreadedTaskResult.ixx
+++ b/include/TFEL/System/ThreadedTaskResult.ixx
@@ -75,7 +75,7 @@ namespace tfel::system {
     if (this->eptr != nullptr) {
       this->rethrow();
     }
-    if (!this->result_has_value()) {
+    if (!this->result.has_value()) {
       ThreadedTaskResultBase::throwBadCastException();
     }
     return *(this->result);