diff --git a/src/Input/input.cxx b/src/Input/input.cxx index 4c80da2dd..48ea1c2b4 100644 --- a/src/Input/input.cxx +++ b/src/Input/input.cxx @@ -265,13 +265,19 @@ FGInput::doKey (int k, int modifiers, int x, int y) b.last_state = 0; } else { if (k >= 1 && k <= 26) { + if (_key_bindings[k + '@'].last_state) doKey(k + '@', KEYMOD_RELEASED, x, y); + if (_key_bindings[k + '`'].last_state) doKey(k + '`', KEYMOD_RELEASED, x, y); } else if (k >= 'A' && k <= 'Z') { + if (_key_bindings[k - '@'].last_state) doKey(k - '@', KEYMOD_RELEASED, x, y); + if (_key_bindings[tolower(k)].last_state) doKey(tolower(k), KEYMOD_RELEASED, x, y); } else if (k >= 'a' && k <= 'z') { + if (_key_bindings[k - '`'].last_state) doKey(k - '`', KEYMOD_RELEASED, x, y); + if (_key_bindings[toupper(k)].last_state) doKey(toupper(k), KEYMOD_RELEASED, x, y); } }