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-rw-r--r--system/include/libc/sys/signal.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/system/include/libc/sys/signal.h b/system/include/libc/sys/signal.h
index 8aaf9d58..e1c2b34a 100644
--- a/system/include/libc/sys/signal.h
+++ b/system/include/libc/sys/signal.h
@@ -135,7 +135,7 @@ int _EXFUN(pthread_sigmask, (int how, const sigset_t *set, sigset_t *oset));
#endif
/* protos for functions found in winsup sources for CYGWIN */
-#if defined(__CYGWIN__) || defined(__rtems__)
+#if defined(EMSCRIPTEN) || defined(__CYGWIN__) || defined(__rtems__)
#undef sigaddset
#undef sigdelset
#undef sigemptyset