diff --git a/plugins/feature/startracker/startrackergui.cpp b/plugins/feature/startracker/startrackergui.cpp
index f2a83c792..2fe36a244 100644
--- a/plugins/feature/startracker/startrackergui.cpp
+++ b/plugins/feature/startracker/startrackergui.cpp
@@ -2279,7 +2279,8 @@ bool StarTrackerGUI::readSolarFlux()
             // HHMMSS 245    410     610    1415   2695   4995   8800  15400   Mhz
             // 000000 000019 000027 000037 000056 000073 000116 000202 000514  sfu
             // Occasionally, file will contain ////// in a column, presumably to indicate no data
-            QRegExp re("([0-9]{2})([0-9]{2})([0-9]{2}) ([0-9\\/]+) ([0-9\\/]+) ([0-9\\/]+) ([0-9\\/]+) ([0-9\\/]+) ([0-9\\/]+) ([0-9\\/]+) ([0-9\\/]+)");
+            // Values can be negative
+            QRegExp re("([0-9]{2})([0-9]{2})([0-9]{2}) (-?[0-9\\/]+) (-?[0-9\\/]+) (-?[0-9\\/]+) (-?[0-9\\/]+) (-?[0-9\\/]+) (-?[0-9\\/]+) (-?[0-9\\/]+) (-?[0-9\\/]+)");
 
             if (re.indexIn(string) != -1)
             {