diff --git a/drivers/saul/saul_str.c b/drivers/saul/saul_str.c
index 255037d879..32233c73c0 100644
--- a/drivers/saul/saul_str.c
+++ b/drivers/saul/saul_str.c
@@ -53,6 +53,7 @@ const char *saul_class_to_str(const uint8_t class_id)
         case SAUL_SENSE_DISTANCE:  return "SENSE_DISTANCE";
         case SAUL_SENSE_CO2:       return "SENSE_CO2";
         case SAUL_SENSE_TVOC:      return "SENSE_TVOC";
+        case SAUL_SENSE_PROXIMITY: return "SENSE_PROXIMITY";
         case SAUL_CLASS_ANY:       return "CLASS_ANY";
         case SAUL_SENSE_OCCUP:     return "SENSE_OCCUP";
         default:                   return "CLASS_UNKNOWN";