diff --git a/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx b/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx
index d5850e1a3..0125bfc07 100644
--- a/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx
+++ b/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx
@@ -678,7 +678,12 @@ int Fl_Wayland_Screen_Driver::compose(int& del) {
   // letter+modifier key
   int condition = (Fl::e_state & (FL_ALT | FL_META | FL_CTRL)) && ascii < 128 ;
   // pressing modifier key
+  // FL_Shift_L, FL_Shift_R, FL_Control_L, FL_Control_R, FL_Caps_Lock
+  // FL_Meta_L, FL_Meta_R, FL_Alt_L, FL_Alt_R
+  // TODO: FL_Alt_Gr
   condition |= (Fl::e_keysym >= FL_Shift_L && Fl::e_keysym <= FL_Alt_R);
+  // FL_Home FL_Left FL_Up FL_Right FL_Down FL_Page_Up FL_Page_Down FL_End
+  // FL_Print FL_Insert FL_Menu FL_Help and more
   condition |= (Fl::e_keysym >= FL_Home && Fl::e_keysym <= FL_Help);
   condition |= Fl::e_keysym == FL_Tab;
 //fprintf(stderr, "compose: condition=%d e_state=%x ascii=%d\n", condition, Fl::e_state, ascii);
diff --git a/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx b/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx
index 6f6d20828..2534d63a5 100644
--- a/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx
+++ b/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx
@@ -332,7 +332,7 @@ void Fl_WinAPI_Screen_Driver::get_system_colors()
 
 int Fl_WinAPI_Screen_Driver::compose(int &del) {
   unsigned char ascii = (unsigned char)Fl::e_text[0];
-  int condition = (Fl::e_state & (FL_ALT | FL_META)) && !(ascii & 128) ;
+  int condition = (Fl::e_state & (FL_ALT | FL_META | FL_CTRL)) && !(ascii & 128) ;
   if (condition) { // this stuff is to be treated as a function key
     del = 0;
     return 0;