diff --git a/src/input/r_usf.cpp b/src/input/r_usf.cpp
index 2a567d4ae..7aa2d45c0 100644
--- a/src/input/r_usf.cpp
+++ b/src/input/r_usf.cpp
@@ -294,6 +294,7 @@ usf_reader_c::end_cb(const char *name) {
   }
 
   m_data_buffer = "";
+  m_previous_start = "";
 }
 
 void