diff --git a/jtag/ChangeLog b/jtag/ChangeLog
index ab3563e9..6f693472 100644
--- a/jtag/ChangeLog
+++ b/jtag/ChangeLog
@@ -1,3 +1,8 @@
+2008-10-23  Arnim Laeuger  <arniml@users.sourceforge.net>
+
+   * src/svf/svf_bison.y: initialize max_time to 0.0 if
+     the optional MAXIMUM is missing for RUNTEST commands
+
 2008-10-22  Arnim Laeuger  <arniml@users.sourceforge.net>
 
    * src/tap/cable/generic.c: make calibration loop more tolerant for
diff --git a/jtag/src/svf/svf_bison.y b/jtag/src/svf/svf_bison.y
index b4cfa843..cf8b1b79 100644
--- a/jtag/src/svf/svf_bison.y
+++ b/jtag/src/svf/svf_bison.y
@@ -332,6 +332,9 @@ runtest_time
 
 runtest_max_time_opt
             : 
+              {
+                priv_data->parser_params.runtest.max_time = 0.0;
+              }
             | MAXIMUM NUMBER SEC
               {
                 priv_data->parser_params.runtest.max_time = $<dvalue>2;