diff --git a/src/lib3270++/private.h b/src/lib3270++/private.h
index aff848d..1be8d2f 100644
--- a/src/lib3270++/private.h
+++ b/src/lib3270++/private.h
@@ -223,9 +223,23 @@
 			private:
 
 #ifdef _WIN32
+				/// @brief IPC Data type.
+				enum Type : uint8_t {
+					String	= 's',
+					Boolean	= 'b',
+					Uchar	= 'y',
+					Int16	= 'n',
+					Uint16	= 'q',
+					Int32	= 'i',
+					Int32x	= 'h',
+					Uint32	= 'u',
+					Int64	= 'x',
+					Uint64	= 't'
+				};
+
 				#pragma pack(1)
 				struct DataBlock {
-					uint8_t	  type;
+					Type type;
 				};
 				#pragma pack()
 
diff --git a/src/lib3270++/windows/request.cc b/src/lib3270++/windows/request.cc
index f201e6b..e86c89b 100644
--- a/src/lib3270++/windows/request.cc
+++ b/src/lib3270++/windows/request.cc
@@ -81,6 +81,7 @@
 
 	IPC::Request & IPC::Request::push(const char *arg) {
 		IPC::Request::DataBlock * block = createDataBlock(arg, strlen(arg)+1);
+		block->type = IPC::Request::String;
 		output.push_back(block);
 		return *this;
 	}
--
libgit2 0.21.2