diff --git a/include/ogg/os_types.h b/include/ogg/os_types.h
index eb8a322..6f73b72 100644
--- a/include/ogg/os_types.h
+++ b/include/ogg/os_types.h
@@ -71,6 +71,7 @@
 #elif (defined(__APPLE__) && defined(__MACH__)) /* MacOS X Framework build */
 
 #  include <sys/types.h>
+#  include <stdint.h>
    typedef int16_t ogg_int16_t;
    typedef uint16_t ogg_uint16_t;
    typedef int32_t ogg_int32_t;