--- a/src/mcmctree.c
+++ b/src/mcmctree.c
@@ -42,7 +42,7 @@ extern double PjumpOptimum;

 int GetOptions(char *ctlf);
 int ReadTreeSeqs(FILE*fout);
-int ProcessNodeAnnotation();
+int ProcessNodeAnnotation(int* haslabel);
 int ReadBlengthGH(char infile[]);
 int GenerateBlengthGH(char infile[]);
 int GetMem(void);