diff --git a/src/signal/cbindgen.toml b/src/signal/cbindgen.toml
index c69f579e82..89d34bbcc2 100644
--- a/src/signal/cbindgen.toml
+++ b/src/signal/cbindgen.toml
@@ -1,4 +1,4 @@
-sys_includes = ["sys/types.h"]
+sys_includes = ["stdint.h", "sys/types.h"]
 include_guard = "_SIGNAL_H"
 style = "Tag"
 language = "C"