diff --git a/src/kind_module.F90 b/src/kind_module.F90
new file mode 100644
index 0000000..f33a5ec
--- /dev/null
+++ b/src/kind_module.F90
@@ -0,0 +1,25 @@
+!*****************************************************************************************
+!> author: Jacob Williams
+!
+!  Define the numeric kinds.
+
+    module kind_module
+
+    use, intrinsic :: iso_fortran_env,    only: real32,real64,real128
+
+    implicit none
+
+    private
+
+#ifdef REAL32
+    integer,parameter,public :: wp = real32   !! real kind used by this module [4 bytes]
+#elif REAL64
+    integer,parameter,public :: wp = real64   !! real kind used by this module [8 bytes]
+#elif REAL128
+    integer,parameter,public :: wp = real128  !! real kind used by this module [16 bytes]
+#else
+    integer,parameter,public :: wp = real64   !! real kind used by this module [8 bytes]
+#endif
+
+    end module kind_module
+!*****************************************************************************************
diff --git a/src/kind_module.f90 b/src/kind_module.f90
deleted file mode 100644
index 8bc86a5..0000000
--- a/src/kind_module.f90
+++ /dev/null
@@ -1,19 +0,0 @@
-!*****************************************************************************************
-!> author: Jacob Williams
-!
-!  Define the numeric kinds.
-
-    module kind_module
-
-    use, intrinsic :: iso_fortran_env,    only: real32,real64,real128
-
-    implicit none
-
-    private
-
-    !integer,parameter,public :: wp = real32     !! single precision reals
-    integer,parameter,public :: wp = real64      !! double precision reals
-    !integer,parameter,public :: wp = real128    !! quad precision reals
-
-    end module kind_module
-!*****************************************************************************************