diff --git a/libraries/AP_OSD/AP_OSD_Screen.cpp b/libraries/AP_OSD/AP_OSD_Screen.cpp
index 604eabb951..3af472eab4 100644
--- a/libraries/AP_OSD/AP_OSD_Screen.cpp
+++ b/libraries/AP_OSD/AP_OSD_Screen.cpp
@@ -285,7 +285,7 @@ void AP_OSD_Screen::draw_speed_vector(uint8_t x, uint8_t y,Vector2f v, int32_t y
     float v_length = v.length();
     char arrow = SYM_ARROW_START;
     if (v_length > 1.0f) {
-        int32_t angle = wrap_360_cd(DEGX100 * atan2f(v.x, v.y) - yaw);
+        int32_t angle = wrap_360_cd(DEGX100 * atan2f(v.y, v.x) - yaw);
         int32_t interval = 36000 / SYM_ARROW_COUNT;
         arrow = SYM_ARROW_START + ((angle + interval / 2) / interval) % SYM_ARROW_COUNT;
     }