diff --git a/bits/types/sigevent_t.h b/bits/types/sigevent_t.h
index 7b8cb05..5611268 100644
--- a/bits/types/sigevent_t.h
+++ b/bits/types/sigevent_t.h
@@ -2,15 +2,15 @@
 #define __sigevent_t_defined 1
 
 #include <bits/types.h>
-#include <bits/types/sigval_t.h>
+#include <bits/types/__sigval_t.h>
 
 /* Structure to transport application-defined values with signals.  */
 typedef struct sigevent
   {
-    sigval_t sigev_value;
+    __sigval_t sigev_value;
     int sigev_signo;
     int sigev_notify;
-    void (*sigev_notify_function) (sigval_t);	    /* Function to start.  */
+    void (*sigev_notify_function) (__sigval_t);	    /* Function to start.  */
     void *sigev_notify_attributes;		    /* Really pthread_attr_t.*/
   } sigevent_t;
 
diff --git a/bits/types/siginfo_t.h b/bits/types/siginfo_t.h
index ab6bf18..1ac2a98 100644
--- a/bits/types/siginfo_t.h
+++ b/bits/types/siginfo_t.h
@@ -2,7 +2,7 @@
 #define __siginfo_t_defined 1
 
 #include <bits/types.h>
-#include <bits/types/sigval_t.h>
+#include <bits/types/__sigval_t.h>
 
 typedef struct siginfo
   {
@@ -15,7 +15,7 @@ typedef struct siginfo
     void *si_addr;		/* Address of faulting instruction.  */
     int si_status;		/* Exit value or signal.  */
     long int si_band;		/* Band event for SIGPOLL.  */
-    sigval_t si_value;		/* Signal value.  */
+    __sigval_t si_value;	/* Signal value.  */
   } siginfo_t;
 
 #endif
diff --git a/include/bits/types/__sigval_t.h b/include/bits/types/__sigval_t.h
new file mode 100644
index 0000000..62f8e48
--- /dev/null
+++ b/include/bits/types/__sigval_t.h
@@ -0,0 +1 @@
+#include <signal/bits/types/__sigval_t.h>
diff --git a/signal/Makefile b/signal/Makefile
index 8c9a7d1..a6a1289 100644
--- a/signal/Makefile
+++ b/signal/Makefile
@@ -30,7 +30,8 @@ headers := signal.h sys/signal.h \
 	   bits/types/__sigset_t.h bits/types/sig_atomic_t.h \
 	   bits/types/sigevent_t.h bits/types/siginfo_t.h \
 	   bits/types/sigset_t.h bits/types/sigval_t.h \
-	   bits/types/stack_t.h bits/types/struct_sigstack.h
+	   bits/types/stack_t.h bits/types/struct_sigstack.h \
+	   bits/types/__sigval_t.h
 
 routines	:= signal raise killpg \
 		   sigaction sigprocmask kill \
diff --git a/signal/bits/types/__sigval_t.h b/signal/bits/types/__sigval_t.h
new file mode 100644
index 0000000..90cba5b
--- /dev/null
+++ b/signal/bits/types/__sigval_t.h
@@ -0,0 +1,23 @@
+#ifndef ____sigval_t_defined
+#define ____sigval_t_defined
+
+/* Type for data associated with a signal.  */
+#ifdef __USE_POSIX199309
+union sigval
+{
+  int sival_int;
+  void *sival_ptr;
+};
+
+typedef union sigval __sigval_t;
+#else
+union __sigval
+{
+  int __sival_int;
+  void *__sival_ptr;
+};
+
+typedef union __sigval __sigval_t;
+#endif
+
+#endif
diff --git a/signal/bits/types/sigval_t.h b/signal/bits/types/sigval_t.h
index 666598f..a05d7f4 100644
--- a/signal/bits/types/sigval_t.h
+++ b/signal/bits/types/sigval_t.h
@@ -1,13 +1,18 @@
 #ifndef __sigval_t_defined
 #define __sigval_t_defined
 
-/* Type for data associated with a signal.  */
-union sigval
-{
-  int sival_int;
-  void *sival_ptr;
-};
-
-typedef union sigval sigval_t;
+#include <bits/types/__sigval_t.h>
+
+/* To avoid sigval_t (not a standard type name) having C++ name
+   mangling depending on whether the selected standard includes union
+   sigval, it should not be defined at all when using a standard for
+   which the sigval name is not reserved; in that case, headers should
+   not include <bits/types/sigval_t.h> and should use only the
+   internal __sigval_t name.  */
+#ifndef __USE_POSIX199309
+# error "sigval_t defined for standard not including union sigval"
+#endif
+
+typedef __sigval_t sigval_t;
 
 #endif
diff --git a/signal/signal.h b/signal/signal.h
index c8f6100..416c5a2 100644
--- a/signal/signal.h
+++ b/signal/signal.h
@@ -58,6 +58,10 @@ typedef __uid_t uid_t;
 # include <bits/siginfo-consts.h>
 #endif
 
+#ifdef __USE_MISC
+# include <bits/types/sigval_t.h>
+#endif
+
 #ifdef __USE_POSIX199309
 # include <bits/types/sigevent_t.h>
 # include <bits/sigevent-consts.h>
diff --git a/sysdeps/unix/sysv/linux/bits/types/sigevent_t.h b/sysdeps/unix/sysv/linux/bits/types/sigevent_t.h
index 0d4857b..e8b28de 100644
--- a/sysdeps/unix/sysv/linux/bits/types/sigevent_t.h
+++ b/sysdeps/unix/sysv/linux/bits/types/sigevent_t.h
@@ -3,7 +3,7 @@
 
 #include <bits/wordsize.h>
 #include <bits/types.h>
-#include <bits/types/sigval_t.h>
+#include <bits/types/__sigval_t.h>
 
 #define __SIGEV_MAX_SIZE	64
 #if __WORDSIZE == 64
@@ -21,7 +21,7 @@ typedef union pthread_attr_t pthread_attr_t;
 /* Structure to transport application-defined values with signals.  */
 typedef struct sigevent
   {
-    sigval_t sigev_value;
+    __sigval_t sigev_value;
     int sigev_signo;
     int sigev_notify;
 
@@ -35,7 +35,7 @@ typedef struct sigevent
 
 	struct
 	  {
-	    void (*_function) (sigval_t);	/* Function to start.  */
+	    void (*_function) (__sigval_t);	/* Function to start.  */
 	    pthread_attr_t *_attribute;		/* Thread attributes.  */
 	  } _sigev_thread;
       } _sigev_un;
diff --git a/sysdeps/unix/sysv/linux/bits/types/siginfo_t.h b/sysdeps/unix/sysv/linux/bits/types/siginfo_t.h
index bed6914..33766d1 100644
--- a/sysdeps/unix/sysv/linux/bits/types/siginfo_t.h
+++ b/sysdeps/unix/sysv/linux/bits/types/siginfo_t.h
@@ -3,7 +3,7 @@
 
 #include <bits/wordsize.h>
 #include <bits/types.h>
-#include <bits/types/sigval_t.h>
+#include <bits/types/__sigval_t.h>
 
 #define __SI_MAX_SIZE	128
 #if __WORDSIZE == 64
@@ -64,7 +64,7 @@ typedef struct
 	  {
 	    int si_tid;		/* Timer ID.  */
 	    int si_overrun;	/* Overrun count.  */
-	    sigval_t si_sigval;	/* Signal value.  */
+	    __sigval_t si_sigval;	/* Signal value.  */
 	  } _timer;
 
 	/* POSIX.1b signals.  */
@@ -72,7 +72,7 @@ typedef struct
 	  {
 	    __pid_t si_pid;	/* Sending process ID.  */
 	    __uid_t si_uid;	/* Real user ID of sending process.  */
-	    sigval_t si_sigval;	/* Signal value.  */
+	    __sigval_t si_sigval;	/* Signal value.  */
 	  } _rt;
 
 	/* SIGCHLD.  */
