diff --git a/vcd/VCD.java b/vcd/VCD.java
index 157f98c..408586c 100644
--- a/vcd/VCD.java
+++ b/vcd/VCD.java
@@ -455,7 +455,7 @@ public void collectTimes()throws IOException
             // One bit signals have no space between value and symbol
             else if(parts.length == 1)
             {
-                currentTimePoint.addPair(new SigVal(line.substring(1), line.substring(0,0)));
+                currentTimePoint.addPair(new SigVal(line.substring(1), line.substring(0,1)));
             }
             else if(parts.length == 2)
             {