diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1927c44..db53ea0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,8 +11,12 @@ if(NOT realbits)
   set(realbits 64)
 endif()
 
-# --- other libraries
-add_library(maptran SHARED src/maptran.F90 src/vallado.F90)
+if(NOT WIN32)
+  option(BUILD_SHARED_LIBS "Shared libraries .so. Feel free to turn off." ON)
+endif()
+
+# --- Maptran library
+add_library(maptran src/maptran.F90 src/vallado.F90)
 target_compile_options(maptran PRIVATE ${FFLAGS})
 target_compile_definitions(maptran PUBLIC REALBITS=${realbits})
 # --- testing
diff --git a/src/vallado.F90 b/src/vallado.F90
index cd04032..aa9cb5c 100644
--- a/src/vallado.F90
+++ b/src/vallado.F90
@@ -14,7 +14,7 @@ module vallado
 
   real(wp), parameter :: pi = 4._wp * atan(1.0_wp)
 
-  type,public :: time
+  type,public :: datetime
      integer :: year, month, day, hour, minute
      real(wp) :: second
   end type
@@ -133,7 +133,7 @@ elemental real(wp) function toJulian(t) result(jd)
 ! -----
 ! JD: Julian Date
 
-  type(time), intent(in) :: t
+  type(datetime), intent(in) :: t
   real(wp) :: B, y, m
   
   y = t%year
diff --git a/tests/test_mod.f90 b/tests/test_mod.f90
index cfe5619..0942559 100644
--- a/tests/test_mod.f90
+++ b/tests/test_mod.f90
@@ -23,7 +23,7 @@ program Test
                                      deg0 = [15,30,45], &
                                      aaz = [33,43,53]
                                      
-type(time), parameter :: t0 = time(2014,4,6,8,0,0) ! UTC 
+type(datetime), parameter :: t0 = datetime(2014,4,6,8,0,0) ! UTC 
 real(wp), parameter ::  jd0 = 2456753.833333_wp
 
 
@@ -190,5 +190,5 @@ program Test
                    err_msg='angle_sep')
 
 
-print *,'OK: Maptran'
+print *,'OK: Maptran ',storage_size(0._wp),' bits'
 end program