diff --git a/src/header/signal/mod.rs b/src/header/signal/mod.rs
index db1f70cdf9..c2807f299e 100644
--- a/src/header/signal/mod.rs
+++ b/src/header/signal/mod.rs
@@ -513,7 +513,6 @@ pub unsafe extern "C" fn sigtimedwait(
     Sys::sigtimedwait(unsafe { &*set }, unsafe { sig.as_mut() }, unsafe {
         tp.as_ref()
     })
-    .map(|()| 0)
     .or_minus_one_errno()
 }
 
diff --git a/src/platform/linux/signal.rs b/src/platform/linux/signal.rs
index cb50c126a8..ced779f512 100644
--- a/src/platform/linux/signal.rs
+++ b/src/platform/linux/signal.rs
@@ -137,7 +137,7 @@ impl PalSignal for Sys {
         set: &sigset_t,
         sig: Option<&mut siginfo_t>,
         tp: Option<&timespec>,
-    ) -> Result<()> {
+    ) -> Result<c_int> {
         unsafe {
             e_raw(syscall!(
                 RT_SIGTIMEDWAIT,
@@ -146,7 +146,7 @@ impl PalSignal for Sys {
                 tp.map_or_else(core::ptr::null, |t| t as *const _),
                 size_of::<sigset_t>()
             ))
-            .map(|_| ())
+            .map(|s| s as c_int)
         }
     }
 }
diff --git a/src/platform/pal/signal.rs b/src/platform/pal/signal.rs
index cf6b3989b2..747e38acb1 100644
--- a/src/platform/pal/signal.rs
+++ b/src/platform/pal/signal.rs
@@ -35,5 +35,5 @@ pub trait PalSignal: Pal {
         set: &sigset_t,
         sig: Option<&mut siginfo_t>,
         tp: Option<&timespec>,
-    ) -> Result<()>;
+    ) -> Result<c_int>;
 }
diff --git a/src/platform/redox/signal.rs b/src/platform/redox/signal.rs
index 2854d283d9..8010d37b92 100644
--- a/src/platform/redox/signal.rs
+++ b/src/platform/redox/signal.rs
@@ -249,7 +249,7 @@ impl PalSignal for Sys {
         set: &sigset_t,
         info_out: Option<&mut siginfo_t>,
         timeout: Option<&timespec>,
-    ) -> Result<(), Errno> {
+    ) -> Result<c_int, Errno> {
         // TODO: deadline-based API
         let timeout = timeout.map(|timeout| syscall::TimeSpec {
             tv_sec: timeout.tv_sec,
@@ -259,6 +259,6 @@ impl PalSignal for Sys {
         if let Some(out) = info_out {
             *out = info;
         }
-        Ok(())
+        Ok(info.si_signo)
     }
 }
diff --git a/tests/sigqueue.c b/tests/sigqueue.c
index 08bbebc41e..c69270f1c1 100644
--- a/tests/sigqueue.c
+++ b/tests/sigqueue.c
@@ -100,6 +100,7 @@ int main(void)
     struct timespec t = (struct timespec){.tv_sec = 1, .tv_nsec = 200000000};
     status = sigtimedwait(&set, &info, &t);
     ERROR_IF(sigtimedwait, status, == -1);
+    assert(status == THE_SIG);
     validate(THE_SIG, &info);
     assert(num == 0); // ensure no signal handler ran