diff --git a/procps/top.c b/procps/top.c
index 5963c35..c0f78f7 100644
--- a/procps/top.c
+++ b/procps/top.c
@@ -78,7 +78,7 @@
     return (int)((Q->stime + Q->utime) - (P->stime + P->utime));
 }
 
-int mult_lvl_cmp(void* a, void* b) {
+static int mult_lvl_cmp(void* a, void* b) {
     int i, cmp_val;
 
     for(i = 0; i < sort_depth; i++) {