diff --git a/gcc/system.h b/gcc/system.h
index d04f8fd33..636084682 100644
--- a/gcc/system.h
+++ b/gcc/system.h
@@ -197,25 +197,6 @@ extern int fprintf_unlocked (FILE *, const char *, ...);
 /* Include <string> before "safe-ctype.h" to avoid GCC poisoning
    the ctype macros through safe-ctype.h */
 
-#ifdef __cplusplus
-#ifdef INCLUDE_STRING
-# include <string>
-#endif
-#endif
-
-/* There are an extraordinary number of issues with <ctype.h>.
-   The last straw is that it varies with the locale.  Use libiberty's
-   replacement instead.  */
-#include "safe-ctype.h"
-
-#include <sys/types.h>
-
-#include <errno.h>
-
-#if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
-extern int errno;
-#endif
-
 #ifdef __cplusplus
 #if defined (INCLUDE_ALGORITHM) || !defined (HAVE_SWAP_IN_UTILITY)
 # include <algorithm>
@@ -229,6 +210,9 @@ extern int errno;
 #ifdef INCLUDE_SET
 # include <set>
 #endif
+#ifdef INCLUDE_STRING
+# include <string>
+#endif
 #ifdef INCLUDE_VECTOR
 # include <vector>
 #endif
@@ -237,6 +221,25 @@ extern int errno;
 # include <utility>
 #endif
 
+#ifdef __cplusplus
+#ifdef INCLUDE_STRING
+# include <string>
+#endif
+#endif
+
+/* There are an extraordinary number of issues with <ctype.h>.
+   The last straw is that it varies with the locale.  Use libiberty's
+   replacement instead.  */
+#include "safe-ctype.h"
+
+#include <sys/types.h>
+
+#include <errno.h>
+
+#if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
+extern int errno;
+#endif
+
 /* Some of glibc's string inlines cause warnings.  Plus we'd rather
    rely on (and therefore test) GCC's string builtins.  */
 #define __NO_STRING_INLINES