diff --git a/librb/include/rb_lib.h b/librb/include/rb_lib.h
index d420bc9a9..7646718e6 100644
--- a/librb/include/rb_lib.h
+++ b/librb/include/rb_lib.h
@@ -203,6 +203,10 @@ char *rb_strerror(int error);
 #define UINT16_MAX (65535U)
 #endif
 
+#ifndef UINT32_MAX
+#define UINT32_MAX (4294967295U)
+#endif
+
 
 typedef void log_cb(const char *buffer);
 typedef void restart_cb(const char *buffer);