diff --git a/src/header/signal/cbindgen.toml b/src/header/signal/cbindgen.toml
index e2e7cd12..280b1dbc 100644
--- a/src/header/signal/cbindgen.toml
+++ b/src/header/signal/cbindgen.toml
@@ -6,7 +6,7 @@
 # - "pid_t As described in <sys/types.h>."
 # - "The <signal.h> header shall define the pthread_attr_t type as described in <sys/types.h>."
 # - "Inclusion of the <signal.h> header may make visible all symbols from the <time.h> header."
-sys_includes = ["sys/types.h"]
+sys_includes = ["sys/types.h", "stdint.h"]
 include_guard = "_RELIBC_SIGNAL_H"
 after_includes = """
 #include <bits/timespec.h> // for timespec from time.h
diff --git a/src/header/sys_select/mod.rs b/src/header/sys_select/mod.rs
index c70581db..245578b4 100644
--- a/src/header/sys_select/mod.rs
+++ b/src/header/sys_select/mod.rs
@@ -130,8 +130,23 @@ pub fn select_epoll(
 
     let mut events: [epoll_event; 32] = unsafe { mem::zeroed() };
     let epoll_timeout = if not_epoll > 0 {
-        // Do not wait if any non-epoll file descriptors were found
-        0
+        // Non-epoll FDs (e.g. TTY on Redox) cannot be monitored by epoll.
+        // Poll with a 100ms interval instead of returning immediately (timeout=0),
+        // which would cause a busy-loop at 100% CPU for callers like mc.
+        match timeout {
+            Some(timeout) => {
+                let sec_ms = (timeout.tv_sec as c_int).checked_mul(1000);
+                let usec_ms = (timeout.tv_usec as c_int) / 1000;
+                match sec_ms.and_then(|s| s.checked_add(usec_ms)) {
+                    Some(s) => {
+                        let user_ms = s as c_int;
+                        if user_ms > 100 { 100 } else { user_ms }
+                    }
+                    None => 100,
+                }
+            }
+            None => 100,
+        }
     } else {
         match timeout {
             Some(timeout) => {