diff --git a/examples/domtop/domtop.c b/examples/domtop/domtop.c
index c9b51aed51..e463e2873f 100644
--- a/examples/domtop/domtop.c
+++ b/examples/domtop/domtop.c
@@ -206,7 +206,7 @@ print_cpu_usage(size_t cpu,
     }
 
     for (i = 0; i < ncpus; i++) {
-        size_t pos;
+        size_t pos = 0;
         double usage;
 
         /* check if the vCPU is in the maps */