diff --git a/src/timeman.cpp b/src/timeman.cpp
index 013d5f46..5e9304d5 100644
--- a/src/timeman.cpp
+++ b/src/timeman.cpp
@@ -44,7 +44,7 @@ namespace {
 
   double move_importance(int ply) {
 
-    return 1 / pow((1 + exp((ply - xshift) / xscale)), skewfactor);
+    return pow((1 + exp((ply - xshift) / xscale)), -skewfactor);
   }