diff --git a/src/bpt/makeBpt.c b/src/bpt/makeBpt.c
index 61406c7ca..f9af41543 100644
--- a/src/bpt/makeBpt.c
+++ b/src/bpt/makeBpt.c
@@ -62,6 +62,7 @@ static int create_break(struct brkCreateInfo *pbci, brkInt *pabrkInt,
 	int max_breaks, int *n_breaks);
 static char inbuf[MAX_LINE_SIZE];
 static int linenum=0;
+void *pdbbase=NULL;
 
 typedef struct dataList{
 	struct dataList *next;