diff --git a/lib/csharp/src/Protocol/TProtocolException.cs b/lib/csharp/src/Protocol/TProtocolException.cs
index 41c26a3..7bef236 100644
--- a/lib/csharp/src/Protocol/TProtocolException.cs
+++ b/lib/csharp/src/Protocol/TProtocolException.cs
@@ -43,7 +43,7 @@
         }
 
         public TProtocolException(int type, Exception inner = null)
-            : base(string.Empty,inner)
+            : base(string.Empty, inner)
         {
             type_ = type;
         }
diff --git a/lib/csharp/src/TException.cs b/lib/csharp/src/TException.cs
index aa9a210..b9fae6e 100644
--- a/lib/csharp/src/TException.cs
+++ b/lib/csharp/src/TException.cs
@@ -31,7 +31,7 @@
         {
         }
 
-        public TException(string message, Exception inner)
+        public TException(string message, Exception inner = null)
             : base(message, inner)
         {
         }
diff --git a/lib/hs/CMakeLists.txt b/lib/hs/CMakeLists.txt
index a20a319..1a5b8fd 100644
--- a/lib/hs/CMakeLists.txt
+++ b/lib/hs/CMakeLists.txt
@@ -60,7 +60,7 @@
 
 if(CMAKE_BUILD_TYPE STREQUAL "Debug")
     set(hs_optimize -O0)
-elseif(CMAKE_BUILD_TYPE STREQUAL "Release")
+else()
     set(hs_optimize -O1)
 endif()