diff --git a/src/bin/pgtclsh/pgtkAppInit.c b/src/bin/pgtclsh/pgtkAppInit.c
index 02ec10af6c1..9afa90bd72e 100644
--- a/src/bin/pgtclsh/pgtkAppInit.c
+++ b/src/bin/pgtclsh/pgtkAppInit.c
@@ -12,8 +12,8 @@
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  */
 
-#include "tk.h"
-#include "libpgtcl.h"
+#include <tk.h>
+#include <libpgtcl.h>
 
 /*
  * The following variable is a special hack that is needed in order for