1 files changed, 1 insertions, 1 deletions

diff --git a/m4/pty.m4 b/m4/pty.m4
index ba6a8c02a4..4670f31eb1 100644
--- a/m4/pty.m4
+++ b/m4/pty.m4
@@ -22,7 +22,7 @@ AC_DEFUN([gl_PTY],
         AC_MSG_WARN([[Cannot find forkpty, build will likely fail]])
       else
         PTY_H='pty.h'
-	PTY_HEADER='libutil.h'
+        PTY_HEADER='libutil.h'
       fi
     else
       PTY_H='pty.h'