1 files changed, 4 insertions, 1 deletions
diff --git a/monitor.cc b/monitor.cc
index 4a95293..524b9ae 100644
--- a/monitor.cc
+++ b/monitor.cc
@@ -288,7 +288,10 @@ parseResults(const char *resultStr)
                 } else {
                   hname = he->h_name;
                   /* Remove domain name from end of hostname. */
-                  hname.erase(hname.find_first_of('.'));
+                  size_t dot = hname.find_first_of('.');
+                  if (dot != std::string::npos) {
+                      hname.erase(dot);
+                  }
                 }
 		std::ostringstream hostname;
 		hostname << hname;