diff --git a/src/pgtkfns.c b/src/pgtkfns.c
index 4f5cbd45492..b55728b579c 100644
--- a/src/pgtkfns.c
+++ b/src/pgtkfns.c
@@ -18,8 +18,6 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 
-/* This should be the first include, as it may set up #defines affecting
-   interpretation of even the system includes. */
 #include <config.h>
 
 #include <math.h>
diff --git a/src/pgtkim.c b/src/pgtkim.c
index e182083f055..fc7399eaeac 100644
--- a/src/pgtkim.c
+++ b/src/pgtkim.c
@@ -18,8 +18,6 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 
-/* This should be the first include, as it may set up #defines affecting
-   interpretation of even the system includes. */
 #include <config.h>
 
 #include "pgtkterm.h"
diff --git a/src/pgtkmenu.c b/src/pgtkmenu.c
index e7a862b0c18..0d96666d094 100644
--- a/src/pgtkmenu.c
+++ b/src/pgtkmenu.c
@@ -16,12 +16,6 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 
-/*
- */
-
-
-/* This should be the first include, as it may set up #defines affecting
-   interpretation of even the system includes.  */
 #include <config.h>
 
 #include "lisp.h"
diff --git a/src/pgtkselect.c b/src/pgtkselect.c
index 7e314df8921..c532bda00e3 100644
--- a/src/pgtkselect.c
+++ b/src/pgtkselect.c
@@ -17,8 +17,6 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 
-/* This should be the first include, as it may set up #defines affecting
-   interpretation of even the system includes.  */
 #include <config.h>
 
 #include "lisp.h"
diff --git a/src/pgtkterm.c b/src/pgtkterm.c
index 3d59a239ccd..9e21fe01b4c 100644
--- a/src/pgtkterm.c
+++ b/src/pgtkterm.c
@@ -18,8 +18,6 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 
-/* This should be the first include, as it may set up #defines affecting
-   interpretation of even the system includes. */
 #include <config.h>
 
 /* Work around GCC bug 102671.  */
diff --git a/src/termcap.c b/src/termcap.c
index 8c2bf0e0643..529a0114c85 100644
--- a/src/termcap.c
+++ b/src/termcap.c
@@ -18,7 +18,6 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
 /* Since 2010-03, 073589f4, Emacs 24.1, this file is only used
    by the MS-DOS port of Emacs.  */
 
-/* Emacs config.h may rename various library functions such as malloc.  */
 #include <config.h>
 
 #include <stdlib.h>
diff --git a/src/tparam.c b/src/tparam.c
index 527294270ea..7687ca606f1 100644
--- a/src/tparam.c
+++ b/src/tparam.c
@@ -15,7 +15,6 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
 
-/* Emacs config.h may rename various library functions such as malloc.  */
 #include <config.h>
 
 #include "lisp.h"		/* for xmalloc */