diff --git a/libfreerdp/locale/keyboard.c b/libfreerdp/locale/keyboard.c
index 6eebd6554..56b6f477f 100644
--- a/libfreerdp/locale/keyboard.c
+++ b/libfreerdp/locale/keyboard.c
@@ -373,7 +373,7 @@ DWORD freerdp_keyboard_init_ex(DWORD keyboardLayoutId, const char* keyboardRemap
 
 DWORD freerdp_keyboard_get_rdp_scancode_from_x11_keycode(DWORD keycode)
 {
-	if (keycode > ARRAYSIZE(X11_KEYCODE_TO_VIRTUAL_SCANCODE))
+	if (keycode >= ARRAYSIZE(X11_KEYCODE_TO_VIRTUAL_SCANCODE))
 	{
 		WLog_ERR(TAG, "KeyCode %" PRIu32 " exceeds allowed value range [0,%" PRIuz "]", keycode,
 		         ARRAYSIZE(X11_KEYCODE_TO_VIRTUAL_SCANCODE));
@@ -381,7 +381,7 @@ DWORD freerdp_keyboard_get_rdp_scancode_from_x11_keycode(DWORD keycode)
 	}
 
 	const DWORD scancode = X11_KEYCODE_TO_VIRTUAL_SCANCODE[keycode];
-	if (scancode > ARRAYSIZE(REMAPPING_TABLE))
+	if (scancode >= ARRAYSIZE(REMAPPING_TABLE))
 	{
 		WLog_ERR(TAG, "ScanCode %" PRIu32 " exceeds allowed value range [0,%" PRIuz "]", scancode,
 		         ARRAYSIZE(REMAPPING_TABLE));
@@ -414,7 +414,7 @@ DWORD freerdp_keyboard_get_rdp_scancode_from_x11_keycode(DWORD keycode)
 
 DWORD freerdp_keyboard_get_x11_keycode_from_rdp_scancode(DWORD scancode, BOOL extended)
 {
-	if (scancode > ARRAYSIZE(VIRTUAL_SCANCODE_TO_X11_KEYCODE))
+	if (scancode >= ARRAYSIZE(VIRTUAL_SCANCODE_TO_X11_KEYCODE))
 	{
 		WLog_ERR(TAG, "ScanCode %" PRIu32 " exceeds allowed value range [0,%" PRIuz "]", scancode,
 		         ARRAYSIZE(VIRTUAL_SCANCODE_TO_X11_KEYCODE));