diff --git a/racket/src/rktio/rktio_platform.h b/racket/src/rktio/rktio_platform.h
index 4fcca913be..1f10464bee 100644
--- a/racket/src/rktio/rktio_platform.h
+++ b/racket/src/rktio/rktio_platform.h
@@ -15,6 +15,7 @@
 #  define USE_TIMEZONE_AND_ALTZONE_VAR
 #  define USE_TZNAME_VAR
 #  define USE_NULL_TO_DISCONNECT_UDP
+#  define SIGNAL_NEEDS_REINSTALL
 # else
 /* SunOS4 */
 #  define USE_TM_GMTOFF_FIELD
@@ -46,8 +47,6 @@
 
 # define DIRENT_NO_NAMLEN
 
-# define SIGSET_NEEDS_REINSTALL
-
 # define USE_TIMEZONE_VAR_W_DLS
 # define USE_TZNAME_VAR
 
@@ -174,7 +173,6 @@
 # define DIRENT_NO_NAMLEN
 
 # define SIGCHILD_DOESNT_INTERRUPT_SELECT
-# define SIGSET_NEEDS_REINSTALL
 
 # define CANT_SET_SOCKET_BUFSIZE
 # define NO_NEED_FOR_BEGINTHREAD
@@ -202,8 +200,6 @@
 
 #if defined(__QNX__)
 
-# define SIGSET_NEEDS_REINSTALL
-
 # define BROKEN_READLINK_NUL_TERMINATOR
 
 #endif
@@ -337,8 +333,8 @@
  /* Signals             */
 /***********************/
 
- /* SIGSET_NEEDS_REINSTALL reinstalls a signal handler when it
-    is called to handle a signal. The expected semantics of sigset()
+ /* SIGNAL_NEEDS_REINSTALL reinstalls a signal handler when it
+    is called to handle a signal. The expected semantics of signal()
     (when this flags is not defined) is that a signal handler is NOT
     reset to SIG_DFL after a handler is called to handle a signal. */