diff --git a/met/src/tools/other/ascii2nc/aeronet_handler.h b/met/src/tools/other/ascii2nc/aeronet_handler.h
index 9a04de1dc6..34a47029ce 100644
--- a/met/src/tools/other/ascii2nc/aeronet_handler.h
+++ b/met/src/tools/other/ascii2nc/aeronet_handler.h
@@ -103,7 +103,7 @@ class AeronetHandler : public FileHandler
   
   // Get the observation valid time from the given observation line
 
-  time_t _getValidTime(const DataLine &data_line) const;
+  time_t _getValidTime(const DataLine &data_line, int date_offset) const;
   
   // Read the observations from the given file and add them to the
   // _observations vector.