diff --git a/libraries/AP_DAL/AP_DAL_VisualOdom.h b/libraries/AP_DAL/AP_DAL_VisualOdom.h
index 7d50bddfd7..04ba7d5dd7 100644
--- a/libraries/AP_DAL/AP_DAL_VisualOdom.h
+++ b/libraries/AP_DAL/AP_DAL_VisualOdom.h
@@ -18,7 +18,7 @@ public:
         return RVOH.enabled;
     }
 
-    bool get_delay_ms() const {
+    uint16_t get_delay_ms() const {
         return RVOH.delay_ms;
     }