diff --git a/Inst_eddies/Tests/test_mean_speed.f90 b/Inst_eddies/Tests/test_mean_speed.f90
index 258e0e00186462d12752b58870cace7923e36721..3c78bd8868e2c0d1555d52834c61ffad4d8e5cea 100644
--- a/Inst_eddies/Tests/test_mean_speed.f90
+++ b/Inst_eddies/Tests/test_mean_speed.f90
@@ -13,7 +13,7 @@ program test_mean_speed
   implicit none
 
   real corner(2) ! in degrees
-  real:: center(2) = [9.625, - 33.875] ! longitude and latitude, in degrees
+  real:: center_deg(2) = [9.625, - 33.875] ! longitude and latitude, in degrees
   integer ncid, varid, dimid
   integer:: ishape = 0
   integer nlon, nlat, i
@@ -29,7 +29,7 @@ program test_mean_speed
   character(len = :), allocatable:: contour_filename
   real min_lon_p ! minimum longitude of p, in degrees
 
-  namelist /main_nml/ center, ishape
+  namelist /main_nml/ center_deg, ishape
 
   !---------------------------------------------------------------------
 
@@ -78,11 +78,11 @@ program test_mean_speed
        + ceiling((corner(1) - min_lon_p) / 360.) * 360.
 
   ! Check that extremum is in polyline and grid:
-  if (corner(1) > center(1) .or. center(1) > lon_max &
-       .or. minval(p%part(1)%points(1, :)) > center(1) &
-       .or. center(1) > maxval(p%part(1)%points(1, :))) then
+  if (corner(1) > center_deg(1) .or. center_deg(1) > lon_max &
+       .or. minval(p%part(1)%points(1, :)) > center_deg(1) &
+       .or. center_deg(1) > maxval(p%part(1)%points(1, :))) then
      print *, "corner(1) = ", corner(1)
-     print *, "center(1) = ", center(1)
+     print *, "center_deg(1) = ", center_deg(1)
      print *, "lon_max = ", lon_max
      print *, "minval(p%part(1)%points(1, :)) = ", &
           minval(p%part(1)%points(1, :))
@@ -97,6 +97,6 @@ program test_mean_speed
   forall (i = 1:p%part(1)%n_points) points_xy(:, i) = (p%part(1)%points(:, i) &
        - corner) / step + 1.
   print *, "mean azimuthal speed = ", mean_speed(u, v, p%part(1), points_xy, &
-       center * deg_to_rad, corner * deg_to_rad, step  * deg_to_rad), "m s-1"
+       center_deg * deg_to_rad, corner * deg_to_rad, step  * deg_to_rad), "m s-1"
 
 end program test_mean_speed