diff --git a/base/sched_list.hh b/base/sched_list.hh
index 0e2f3ddcb..f794e3514 100644
--- a/base/sched_list.hh
+++ b/base/sched_list.hh
@@ -30,8 +30,10 @@
 #define SCHED_LIST_HH
 
 #include <list>
+#include "base/intmath.hh"
 #include "base/misc.hh"
 
+
 //  Any types you use this class for must be covered here...
 namespace {
     void ClearEntry(int &i) { i = 0; };
@@ -80,7 +82,7 @@ SchedList<T>::SchedList(unsigned _size)
     size = _size;
 
     //  size must be a power of two
-    if (size & (size-1)) {
+    if (!isPowerOf2(size)) {
         panic("SchedList: size must be a power of two");
     }