diff --git a/src/gui/platform/unix/qxkbcommon.cpp b/src/gui/platform/unix/qxkbcommon.cpp
index 394407e4039..43758de9c5f 100644
--- a/src/gui/platform/unix/qxkbcommon.cpp
+++ b/src/gui/platform/unix/qxkbcommon.cpp
@@ -581,7 +581,7 @@ Qt::KeyboardModifiers QXkbCommon::modifiers(struct xkb_state *state, xkb_keysym_
     if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_LOGO, XKB_STATE_MODS_EFFECTIVE) > 0)
         modifiers |= Qt::MetaModifier;
 
-    if (keysym >= XKB_KEY_KP_Space && keysym <= XKB_KEY_KP_9)
+    if (isKeypad(keysym))
         modifiers |= Qt::KeypadModifier;
 
     return modifiers;