diff --git a/src/terminal/terminaldisplay.h b/src/terminal/terminaldisplay.h
index 00b3f59..81009b0 100644
--- a/src/terminal/terminaldisplay.h
+++ b/src/terminal/terminaldisplay.h
@@ -63,10 +63,6 @@ namespace Terminal {
 
   class Display {
   private:
-    static bool ti_flag( const char *capname );
-    static int ti_num( const char *capname );
-    static const char *ti_str( const char *capname );
-
     bool has_ech; /* erase character is part of vt200 but not supported by tmux
 		     (or by "screen" terminfo entry, which is what tmux advertises) */
 
diff --git a/src/terminal/terminaldisplayinit.cc b/src/terminal/terminaldisplayinit.cc
index 50a0a35..54dfcc9 100644
--- a/src/terminal/terminaldisplayinit.cc
+++ b/src/terminal/terminaldisplayinit.cc
@@ -62,7 +62,7 @@
 
 using namespace Terminal;
 
-bool Display::ti_flag( const char *capname )
+static bool ti_flag( const char *capname )
 {
   int val = tigetflag( const_cast<char *>( capname ) );
   if ( val == -1 ) {
@@ -71,16 +71,7 @@ bool Display::ti_flag( const char *capname )
   return val;
 }
 
-int Display::ti_num( const char *capname )
-{
-  int val = tigetnum( const_cast<char *>( capname ) );
-  if ( val == -2 ) {
-    throw std::invalid_argument( std::string( "Invalid terminfo numeric capability " ) + capname );
-  }
-  return val;
-}
-
-const char *Display::ti_str( const char *capname )
+static const char *ti_str( const char *capname )
 {
   const char *val = tigetstr( const_cast<char *>( capname ) );
   if ( val == (const char *)-1 ) {