diff --git a/src/dvb.h b/src/dvb.h
index bc43e32..a152aa7 100644
--- a/src/dvb.h
+++ b/src/dvb.h
@@ -27,6 +27,9 @@
 #include <linux/dvb/version.h>
 #define DVBAPIVERSION (DVB_API_VERSION << 8 | DVB_API_VERSION_MINOR)
 #define LOGDVBAPIVERSION DVBAPIVERSION
+#ifndef SYS_DVBC_ANNEX_C
+#define SYS_DVBC_ANNEX_C 18
+#endif
 #endif
 
 #if DVBAPIVERSION < 0x0500