--- a/lib/direct/os/linux/glibc/system.c
+++ b/lib/direct/os/linux/glibc/system.c
@@ -111,7 +111,7 @@ direct_tgkill( int tgid, int tid, int sig )
 void
 direct_trap( const char *domain, int sig )
 {
-     sigval_t val;
+     union sigval val;

      if (direct_config->delay_trap_ms) {
           D_LOG( Direct_Trap, VERBOSE, "NOT RAISING signal %d from %s, waiting for %dms... attach gdb --pid=%d\n", sig, domain, direct_config->delay_trap_ms, getpid() );