diff --git a/ADIS_Sumo_Styger/Sumo/Reflectance.h b/ADIS_Sumo_Styger/Sumo/Reflectance.h
index b170fa5..a70c332 100644
--- a/ADIS_Sumo_Styger/Sumo/Reflectance.h
+++ b/ADIS_Sumo_Styger/Sumo/Reflectance.h
@@ -43,7 +43,7 @@
   #define REF_MIN_LINE_VAL       0x100   /* minimum value indicating a line */
   #define REF_MIN_NOISE_VAL      0x40   /* values below this are not added to the weighted sum */
 #endif
-  #define REF_SENSOR_TIMEOUT_US  300   /* after this time, consider no reflection (black). Must be smaller than the timeout period of the RefCnt timer! */
+  #define REF_SENSOR_TIMEOUT_US  400   /* after this time, consider no reflection (black). Must be smaller than the timeout period of the RefCnt timer! */
 #else
   #error "unknown configuration!"
 #endif