diff --git a/src/util/virprocess.c b/src/util/virprocess.c
index 426d56c1ce..647f687cb8 100644
--- a/src/util/virprocess.c
+++ b/src/util/virprocess.c
@@ -453,6 +453,8 @@ int virProcessSetAffinity(pid_t pid,
     size_t i;
     cpuset_t mask;
 
+    VIR_DEBUG("Set process affinity on %lld", (long long)pid);
+
     CPU_ZERO(&mask);
     for (i = 0; i < virBitmapSize(map); i++) {
         if (virBitmapIsBitSet(map, i))