diff --git a/file.go b/file.go
index d514f23..12a5077 100644
--- a/file.go
+++ b/file.go
@@ -150,7 +150,7 @@ func (fp *FilePages) PageHistory(p string) ([]Revision, error) {
 
 	err = cmd.Start()
 	if err != nil {
-		return nil, fmt.Errorf("while starting", err)
+		return nil, fmt.Errorf("while starting: %s", err)
 	}
 
 	buf := bufio.NewScanner(output)
@@ -180,7 +180,7 @@ func (fp *FilePages) PageHistory(p string) ([]Revision, error) {
 	}
 
 	if err := cmd.Wait(); err != nil {
-		return nil, fmt.Errorf("while waiting", err)
+		return nil, fmt.Errorf("while waiting: %s", err)
 	}
 
 	return revisions, nil