diff --git a/sources/user_problem.F90 b/sources/user_problem.F90
index 2a693d4..e78685a 100644
--- a/sources/user_problem.F90
+++ b/sources/user_problem.F90
@@ -307,9 +307,9 @@ module user_problem
             ux(n) = cos(thh) * cos(thv)
             uy(n) = sin(thh) * cos(thv)
             uz(n) =            sin(thv)
-            kx(n) = pi2 * kper * ux(n)
-            ky(n) = pi2 * kper * uy(n)
-            kz(n) = pi2 * kper * uz(n)
+            kx(n) = pi2 * nint(kper * ux(n))
+            ky(n) = pi2 * nint(kper * uy(n))
+            kz(n) = pi2 * nint(kper * uz(n))
             tt = 0.0d+00
             do while(tt < 1.0d-08)
               thh   = pi2 * randuni()
@@ -326,8 +326,8 @@ module user_problem
             uy(n) = fc * uy(n) / tt
             uz(n) = fc * uz(n) / tt
 #else /* NDIMS == 3 */
-            kx(n) = pi2 * kper * cos(thh)
-            ky(n) = pi2 * kper * sin(thh)
+            kx(n) = pi2 * nint(kper * cos(thh))
+            ky(n) = pi2 * nint(kper * sin(thh))
             kz(n) = 0.0d+00
             ux(n) = fc * sin(thh)
             uy(n) = fc * cos(thh)