diff --git a/src/header/sys_wait/cbindgen.toml b/src/header/sys_wait/cbindgen.toml
--- a/src/header/sys_wait/cbindgen.toml
+++ b/src/header/sys_wait/cbindgen.toml
@@ -1,4 +1,4 @@
-sys_includes = ["sys/types.h", "sys/resource.h"]
+sys_includes = ["sys/types.h", "sys/resource.h", "signal.h"]
 include_guard = "_RELIBC_SYS_WAIT_H"
 after_includes = """