diff --git a/asterisk/include/asterisk/plc.h b/asterisk/include/asterisk/plc.h
index 7625049..31df9ab 100644
--- a/asterisk/include/asterisk/plc.h
+++ b/asterisk/include/asterisk/plc.h
@@ -30,8 +30,8 @@
  */
 
 
-#if !defined(_PLC_H_)
-#define _PLC_H_
+#if !defined(_SPANDSP_PLC_H_)
+#define _SPANDSP_PLC_H_
 
 #ifdef SOLARIS
 #include <sys/int_types.h>