diff --git a/telemetry_docs.pdf b/telemetry_docs.pdf
new file mode 100644
index 0000000..2abc714
Binary files /dev/null and b/telemetry_docs.pdf differ
diff --git a/variables.go b/variables.go
index 2bdf80d..735b843 100644
--- a/variables.go
+++ b/variables.go
@@ -210,6 +210,9 @@ func (i *IBT) Update(timeout time.Duration) (IRacingState, error) {
 		start := i.Headers.BufOffset + i.Vars.Tick*i.Headers.BufLen
 		buf := make([]byte, i.Headers.BufLen)
 		_, err := i.File.ReadAt(buf, int64(start))
+		if err == io.EOF {
+			return Ended, nil
+		}
 		if err != nil {
 			return Unknown, err
 		}
@@ -219,10 +222,6 @@ func (i *IBT) Update(timeout time.Duration) (IRacingState, error) {
 			log.Fatalf("What happened?\n%v\n", err)
 		}
 
-		if err == io.EOF {
-			return Ended, nil
-		}
-
 		// This was previously in the read data method, but it probably fits here better
 		i.Vars.Tick++
 	}