diff --git a/gdb/completer.h b/gdb/completer.h
index 8b4ad8ec4d4..b1faa1b2d71 100644
--- a/gdb/completer.h
+++ b/gdb/completer.h
@@ -163,8 +163,11 @@ class completion_match_for_lcd
 	const char *prev = m_match;
 	for (const auto &range : m_ignored_ranges)
 	  {
-	    m_finished_storage.append (prev, range.first);
-	    prev = range.second;
+            if (prev < range.first)
+              {
+                m_finished_storage.append (prev, range.first);
+                prev = range.second;
+              }
 	  }
 	m_finished_storage.append (prev);