diff --git a/kaccess/kaccess.cpp b/kaccess/kaccess.cpp
--- a/kaccess/kaccess.cpp
+++ b/kaccess/kaccess.cpp
@@ -20,6 +20,7 @@
 */
 
 #include <unistd.h>
+#include <cmath>
 
 #include "kaccess.h"
 
@@ -437,7 +438,8 @@
         xcb_generic_event_t* event = static_cast<xcb_generic_event_t *>(message);
         if ((event->response_type & ~0x80) == XkbEventCode + xkb_opcode) {
             xkb_any_ *ev = reinterpret_cast<xkb_any_*>(event);
-            switch (ev->xkbType) {
+            const int eventType = pow(2, ev->xkbType);
+            switch (eventType) {
                 case XCB_XKB_EVENT_TYPE_STATE_NOTIFY:
                     xkbStateNotify();
                     break;