diff --git a/os/hal/src/hal_qei.c b/os/hal/src/hal_qei.c
index ec533ad8..a2b73037 100644
--- a/os/hal/src/hal_qei.c
+++ b/os/hal/src/hal_qei.c
@@ -176,7 +176,7 @@ qeicnt_t qeiGetCount(QEIDriver *qeip) {
  * @api
  */
 qeidelta_t qeiUpdate(QEIDriver *qeip) {
-  qeicnt_t diff;
+  qeidelta_t diff;
 
   osalSysLock();
   diff = qeiUpdateI(qeip);