1 files changed, 2 insertions, 1 deletions
diff --git a/src/AB.c b/src/AB.c
index ee7fdad..872c31c 100644
--- a/src/AB.c
+++ b/src/AB.c
@@ -3,6 +3,7 @@
 #include "cctk_Parameters.h"
 
 #include <assert.h>
+#include <math.h>
 #include <stdlib.h>
 
 #include "ExternalVariables.h"
@@ -178,7 +179,7 @@ void MoL_ABAdd(CCTK_ARGUMENTS)
   if (AB_initially_reduce_order) {
     /* Reduce the order for the first time steps */
     /* int const iteration = cctk_iteration; */
-    int const iteration = 1 + floor((cctk_time - cctk_initial_time) / dt + 0.5);
+    int const iteration = 1 + lrint((cctk_time - cctk_initial_time) / dt);
     if (order > iteration) {
       order = iteration;
       CCTK_VInfo (CCTK_THORNSTRING,