diff --git a/unwind-arm.h b/unwind-arm.h
index 385abab..fa89e8c 100644
--- a/unwind-arm.h
+++ b/unwind-arm.h
@@ -1,3 +1,5 @@
+#include <stdint.h>
+
 /**
  * ARM-specific unwind definitions.  These are taken from the ARM EHABI
  * specification.