diff --git a/src/include/usb_descriptors.h b/src/include/usb_descriptors.h
index 65f1ed4..ae23af7 100644
--- a/src/include/usb_descriptors.h
+++ b/src/include/usb_descriptors.h
@@ -198,6 +198,15 @@ HID_COLLECTION_END \
         HID_REPORT_COUNT( 1                                      )  ,\
         HID_REPORT_SIZE ( 8                                      )  ,\
         HID_INPUT       ( HID_DATA | HID_VARIABLE | HID_RELATIVE )  ,\
+        /* Horizontal wheel (AC Pan) */ \
+        HID_USAGE_PAGE  ( HID_USAGE_PAGE_CONSUMER               )   ,\
+        HID_LOGICAL_MIN ( 0x81                                   )   ,\
+        HID_LOGICAL_MAX ( 0x7f                                   )   ,\
+        HID_REPORT_COUNT( 1                                      )   ,\
+        HID_REPORT_SIZE ( 8                                      )   ,\
+        HID_USAGE_N     ( HID_USAGE_CONSUMER_AC_PAN, 2          )   ,\
+        HID_INPUT       ( HID_DATA | HID_VARIABLE | HID_RELATIVE )  ,\
+        \
         /* Mouse mode (0 = absolute, 1 = relative) */ \
         HID_REPORT_COUNT( 1                                      ), \
         HID_REPORT_SIZE ( 8                                      ), \
diff --git a/src/usb_descriptors.c b/src/usb_descriptors.c
index 2f02594..ef665a0 100644
--- a/src/usb_descriptors.c
+++ b/src/usb_descriptors.c
@@ -81,10 +81,10 @@ uint8_t const *tud_hid_descriptor_report_cb(uint8_t instance) {
     }
 }
 
-    uint8_t instance = ITF_NUM_HID;
-    uint8_t report_id = REPORT_ID_MOUSE;
 bool tud_mouse_report(uint8_t mode, uint8_t buttons, int16_t x, int16_t y, int8_t wheel, int8_t pan) {
     mouse_report_t report = {.buttons = buttons, .wheel = wheel, .x = x, .y = y, .mode = mode, .pan = pan};
+    uint8_t instance = ITF_NUM_HID;
+    uint8_t report_id = REPORT_ID_MOUSE;
 
     if (mode == RELATIVE) {
         instance = ITF_NUM_HID_REL_M;