diff --git a/src/Numerics/Control.cs b/src/Numerics/Control.cs
index f8475fd2..4fd3fee5 100644
--- a/src/Numerics/Control.cs
+++ b/src/Numerics/Control.cs
@@ -86,13 +86,18 @@ namespace MathNet.Numerics
                     case "OPENBLAS":
                         UseNativeOpenBLAS();
                         break;
-#endif
+
                     default:
                         if (!TryUseNative())
                         {
                             UseManaged();
                         }
                         break;
+#else
+                    default:
+                        UseManaged();
+                        break;
+#endif
                 }
             }
             catch