diff --git a/Base/include/VectorBase.h b/Base/include/VectorBase.h
index 5b04112..c9e4ace 100644
--- a/Base/include/VectorBase.h
+++ b/Base/include/VectorBase.h
@@ -110,7 +110,7 @@ namespace FasTC {
                                              const VectorTypeTwo &v2) {
     VectorTypeOne a(v1);
     for(int i = 0; i < VectorTypeOne::Size; i++) {
-      a(i) += static_cast<VectorTypeOne::ScalarType>(v2[i]);
+      a(i) += static_cast<typename VectorTypeOne::ScalarType>(v2[i]);
     }
     return a;
   }
@@ -132,7 +132,7 @@ namespace FasTC {
                                                 const VectorTypeTwo &v2) {
     VectorTypeOne a(v1);
     for(int i = 0; i < VectorTypeOne::Size; i++) {
-      a(i) -= static_cast<VectorTypeOne::ScalarType>(v2[i]);
+      a(i) -= static_cast<typename VectorTypeOne::ScalarType>(v2[i]);
     }
     return a;
   }