diff --git a/ChangeLog b/ChangeLog
index 9a4c5fa9..ab9bee17 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,7 @@
-2017-91-03  Markus Gans  <guru.mail@muenster.de>
+2017-09-07  Markus Gans  <guru.mail@muenster.de>
+	* Type definition exported into a separate header file
+
+2017-09-03  Markus Gans  <guru.mail@muenster.de>
 	* Fixes wrong maximum line width in FListView
 
 2017-08-26  Markus Gans  <guru.mail@muenster.de>
diff --git a/src/fc.h b/src/fc.h
index 37881baa..f0905b2a 100644
--- a/src/fc.h
+++ b/src/fc.h
@@ -13,6 +13,17 @@
 
 #include "fstring.h"
 
+// ascii sequences
+#define ESC    "\033"     // Escape
+#define CSI    ESC "["    // Control sequence introducer (7-bit)
+#define ENQ    "\005"     // Enquiry
+#define BEL    "\007"     // Bell (ctrl‐g)
+#define BS     "\010"     // Backspace
+#define SO     "\016"     // Shift out (alternative character set)
+#define SI     "\017"     // Shift in  (regular character set)
+#define OSC    ESC "]"    // Operating system command (7-bit)
+#define SECDA  ESC "[>c"  // Secondary Device Attributes
+
 
 //----------------------------------------------------------------------
 // class fc
diff --git a/src/fobject.h b/src/fobject.h
index b3d92195..68616745 100644
--- a/src/fobject.h
+++ b/src/fobject.h
@@ -20,7 +20,7 @@
 
 #include "fc.h"
 #include "fevent.h"
-
+#include "ftypes.h"
 
 #define null NULL
 
diff --git a/src/foptiattr.h b/src/foptiattr.h
index 9c0d83f9..a4d663f7 100644
--- a/src/foptiattr.h
+++ b/src/foptiattr.h
@@ -16,11 +16,7 @@
 #include <assert.h>
 #include <term.h>     // need for tparm
 
-// ascii sequences
-#define ESC  "\033"   // Escape
-#define CSI  ESC "["  // Control sequence introducer (7-bit)
-
-typedef unsigned char uChar;
+#include "fc.h"
 
 
 //----------------------------------------------------------------------
diff --git a/src/fstring.h b/src/fstring.h
index 338940fc..f6c0ae7c 100644
--- a/src/fstring.h
+++ b/src/fstring.h
@@ -11,8 +11,6 @@
 #ifndef FSTRING_H
 #define FSTRING_H
 
-#include <sys/types.h>
-
 #include <langinfo.h>
 #include <stdint.h>
 
@@ -33,23 +31,7 @@
 #include <string>
 #include <vector>
 
-
-typedef unsigned char  uChar;
-typedef unsigned int   uInt;
-typedef unsigned long  uLong;
-typedef uint8_t        uInt8;
-typedef uint16_t       uInt16;
-typedef uint32_t       uInt32;
-typedef uint64_t       uInt64;
-
-typedef signed int     sInt;
-typedef signed long    sLong;
-typedef int8_t         sInt8;
-typedef int16_t        sInt16;
-typedef int32_t        sInt32;
-typedef int64_t        sInt64;
-
-typedef long double    lDouble;
+#include "ftypes.h"
 
 
 //----------------------------------------------------------------------
diff --git a/src/fterm.h b/src/fterm.h
index 972346aa..ae60bf34 100644
--- a/src/fterm.h
+++ b/src/fterm.h
@@ -81,15 +81,6 @@
   #undef buttons  // from term.h
 #endif
 
-// ascii sequences
-#define ENQ    "\005"     // Enquiry
-#define BEL    "\007"     // Bell (ctrl‐g)
-#define BS     "\010"     // Backspace
-#define SO     "\016"     // Shift out (alternative character set)
-#define SI     "\017"     // Shift in  (regular character set)
-#define OSC    ESC "]"    // Operating system command (7-bit)
-#define SECDA  ESC "[>c"  // Secondary Device Attributes
-
 
 //----------------------------------------------------------------------
 // class FTerm
diff --git a/src/ftypes.h b/src/ftypes.h
new file mode 100644
index 00000000..34ad0c86
--- /dev/null
+++ b/src/ftypes.h
@@ -0,0 +1,26 @@
+// File: ftypes.h
+
+#ifndef FTYPES_H
+#define FTYPES_H
+
+#include <sys/types.h>
+
+typedef unsigned char  uChar;
+typedef unsigned int   uInt;
+typedef unsigned long  uLong;
+typedef uint8_t        uInt8;
+typedef uint16_t       uInt16;
+typedef uint32_t       uInt32;
+typedef uint64_t       uInt64;
+
+typedef signed int     sInt;
+typedef signed long    sLong;
+typedef int8_t         sInt8;
+typedef int16_t        sInt16;
+typedef int32_t        sInt32;
+typedef int64_t        sInt64;
+
+typedef long double    lDouble;
+
+#endif  // FTYPES_H
+
diff --git a/test/treeview.cpp b/test/treeview.cpp
index c1e5ea31..45d3c8de 100644
--- a/test/treeview.cpp
+++ b/test/treeview.cpp
@@ -75,6 +75,9 @@ Treeview::Treeview (FWidget* parent)
     listView->insert (line);
   }
 
+  // Enable the tree view
+  listView->setTreeView();
+
   // Quit button
   FButton* Quit = new FButton (this);
   Quit->setGeometry(24, 16, 10, 1);