1 files changed, 1 insertions, 1 deletions

diff --git a/src/firemon/firemon.h b/src/firemon/firemon.h
index a873430a3..c5607a792 100644
--- a/src/firemon/firemon.h
+++ b/src/firemon/firemon.h
@@ -75,7 +75,7 @@ void cpu(pid_t pid);
 void cgroup(pid_t pid);
 
 // tree.c
-void tree(pid_t pid);
+void tree(void);
 
 // netstats.c
 void netstats(void);