diff --git a/argp/argp-eexst.c b/argp/argp-eexst.c
index 151f89a1c0..84df089e03 100644
--- a/argp/argp-eexst.c
+++ b/argp/argp-eexst.c
@@ -19,7 +19,7 @@
    02111-1307 USA.  */
 
 #ifdef HAVE_CONFIG_H
-#include <config.h>
+# include <config.h>
 #endif
 
 #include <sysexits.h>
diff --git a/argp/argp-fmtstream.c b/argp/argp-fmtstream.c
index 1004e6762a..55ac7f9183 100644
--- a/argp/argp-fmtstream.c
+++ b/argp/argp-fmtstream.c
@@ -22,7 +22,7 @@
    don't have that.  */
 
 #ifdef HAVE_CONFIG_H
-#include <config.h>
+# include <config.h>
 #endif
 
 #include <stdlib.h>
diff --git a/argp/argp-fmtstream.h b/argp/argp-fmtstream.h
index 5d0d5eac92..f94207a20b 100644
--- a/argp/argp-fmtstream.h
+++ b/argp/argp-fmtstream.h
@@ -26,10 +26,6 @@
 #ifndef _ARGP_FMTSTREAM_H
 #define _ARGP_FMTSTREAM_H
 
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
diff --git a/argp/argp-fs-xinl.c b/argp/argp-fs-xinl.c
index 3cf1f9827d..442ffa05d1 100644
--- a/argp/argp-fs-xinl.c
+++ b/argp/argp-fs-xinl.c
@@ -19,7 +19,7 @@
    02111-1307 USA.  */
 
 #ifdef HAVE_CONFIG_H
-#include <config.h>
+# include <config.h>
 #endif
 
 #define ARGP_FS_EI
diff --git a/argp/argp-xinl.c b/argp/argp-xinl.c
index 73177585e8..7913b061ac 100644
--- a/argp/argp-xinl.c
+++ b/argp/argp-xinl.c
@@ -19,7 +19,7 @@
    02111-1307 USA.  */
 
 #ifdef HAVE_CONFIG_H
-#include <config.h>
+# include <config.h>
 #endif
 
 #if defined _LIBC || defined HAVE_FEATURES_H