diff --git a/sysdeps/i386/dl-tls.h b/sysdeps/i386/dl-tls.h
index 2dac81bbd2..f453931d78 100644
--- a/sysdeps/i386/dl-tls.h
+++ b/sysdeps/i386/dl-tls.h
@@ -16,6 +16,8 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#ifndef _DL_TLS_H
+#define _DL_TLS_H
 
 /* Type used for the representation of TLS information in the GOT.  */
 typedef struct dl_tls_index
@@ -65,3 +67,5 @@ rtld_hidden_def (___tls_get_addr)
 
 # endif
 #endif
+
+#endif /* _DL_TLS_H */
diff --git a/sysdeps/m68k/dl-tls.h b/sysdeps/m68k/dl-tls.h
index 458027868f..85817fcce9 100644
--- a/sysdeps/m68k/dl-tls.h
+++ b/sysdeps/m68k/dl-tls.h
@@ -16,6 +16,8 @@
    License along with the GNU C Library.  If not, see
    <https://www.gnu.org/licenses/>.  */
 
+#ifndef _DL_TLS_H
+#define _DL_TLS_H
 
 /* Type used for the representation of TLS information in the GOT.  */
 typedef struct
@@ -43,3 +45,5 @@ typedef struct
 extern void *__tls_get_addr (tls_index *ti);
 
 #define __TLS_GET_ADDR(__ti)	(__tls_get_addr (__ti) - TLS_DTV_OFFSET)
+
+#endif /* _DL_TLS_H */
diff --git a/sysdeps/mips/dl-tls.h b/sysdeps/mips/dl-tls.h
index 1ce3054bbb..c1859719f5 100644
--- a/sysdeps/mips/dl-tls.h
+++ b/sysdeps/mips/dl-tls.h
@@ -16,6 +16,8 @@
    License along with the GNU C Library.  If not, see
    <https://www.gnu.org/licenses/>.  */
 
+#ifndef _DL_TLS_H
+#define _DL_TLS_H
 
 /* Type used for the representation of TLS information in the GOT.  */
 typedef struct
@@ -42,3 +44,5 @@ typedef struct
 extern void *__tls_get_addr (tls_index *ti);
 
 #define __TLS_GET_ADDR(__ti)	(__tls_get_addr (__ti) - TLS_DTV_OFFSET)
+
+#endif /* _DL_TLS_H */
diff --git a/sysdeps/riscv/dl-tls.h b/sysdeps/riscv/dl-tls.h
index 467c0b6179..b8931a0fa5 100644
--- a/sysdeps/riscv/dl-tls.h
+++ b/sysdeps/riscv/dl-tls.h
@@ -16,6 +16,8 @@
    License along with the GNU C Library.  If not, see
    <https://www.gnu.org/licenses/>.  */
 
+#ifndef _DL_TLS_H
+#define _DL_TLS_H
 
 /* Type used for the representation of TLS information in the GOT.  */
 typedef struct
@@ -45,3 +47,5 @@ extern void *__tls_get_addr (tls_index *ti);
 
 /* Value used for dtv entries for which the allocation is delayed.  */
 #define TLS_DTV_UNALLOCATED	((void *) -1l)
+
+#endif /* _DL_TLS_H */
diff --git a/sysdeps/s390/dl-tls.h b/sysdeps/s390/dl-tls.h
index 53fd362475..34bf840d53 100644
--- a/sysdeps/s390/dl-tls.h
+++ b/sysdeps/s390/dl-tls.h
@@ -16,6 +16,8 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#ifndef _DL_TLS_H
+#define _DL_TLS_H
 
 /* Type used for the representation of TLS information in the GOT.  */
 typedef struct
@@ -105,3 +107,5 @@ extern void *__tls_get_addr_internal (tls_index *ti);
       + (unsigned long) __builtin_thread_pointer (); })
 
 #endif
+
+#endif /* _DL_TLS_H */