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diff --git a/man/man3/TPMLIB_ChooseTPMVersion.pod b/man/man3/TPMLIB_ChooseTPMVersion.pod
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+++ b/man/man3/TPMLIB_ChooseTPMVersion.pod
@@ -0,0 +1,52 @@
+=head1 NAME
+
+TPMLIB_ChooseTPMVersion    - Choose the version of the TPM
+
+=head1 SYNOPSIS
+
+B<#include <libtpms/tpm_types.h>>
+
+B<#include <libtpms/tpm_library.h>>
+
+B<TPM_RESULT TPMLIB_ChooseTPMVersion(TPMLIB_TPMVersion> I<ver>B<);>
+
+ typedef enum TPMLIB_TPMVersion {
+    TPMLIB_TPM_VERSION_1_2,
+    TPMLIB_TPM_VERSION_2,
+ } TPMLIB_TPMVersion;
+
+=head1 DESCRIPTION
+
+The B<TPMLIB_ChooseTPMVersion()> function is used to choose the version
+of the TPM, either a TPM 1.2 or TPM 2.
+
+This function must be called before B<TPMLIB_MainInit()> is called and
+will otherwise return an error. This function may be called again once
+B<TPMLIB_Terminate()> has been called.
+
+If this function is not called, the last chosen TPM version will be
+started with B<TPMLIB_MainInit()>. If this function is not called,
+a TPM  1.2 will be used.
+
+=head1 ERRORS
+
+=over 4
+
+=item B<TPM_SUCCESS>
+
+The version of the TPM was chosen successfully.
+
+=item B<TPM_FAIL>
+
+The choice of the TPM was wrong, or TPMLIB_MainInit() has already been called.
+
+=back
+
+For a complete list of TPM error codes please consult the include file
+B<libtpms/tpm_error.h>
+
+=head1 SEE ALSO
+
+B<TPMLIB_MainInit>(3), B<TPMLIB_Terminate>(3)
+
+=cut