diff --git a/libnfc/chips/pn53x.c b/libnfc/chips/pn53x.c
index c53e10d..c5d3c1b 100644
--- a/libnfc/chips/pn53x.c
+++ b/libnfc/chips/pn53x.c
@@ -418,8 +418,9 @@ const char *
 pn53x_strerror (const nfc_device_t *pnd)
 {
   const char *pcRes = "Unknown error";
+  size_t i;
 
-  for (size_t i=0; i < (sizeof (sErrorMessages) / sizeof (struct sErrorMessage)); i++) {
+  for (i=0; i < (sizeof (sErrorMessages) / sizeof (struct sErrorMessage)); i++) {
     if (sErrorMessages[i].iErrorCode == pnd->iErrorCode) {
       pcRes = sErrorMessages[i].pcErrorMsg;
       break;
diff --git a/windows/win32/nfc.def b/windows/win32/nfc.def
index ba83eaf..9627a18 100644
--- a/windows/win32/nfc.def
+++ b/windows/win32/nfc.def
@@ -26,3 +26,6 @@ EXPORTS
 	iso14443a_crc
 	append_iso14443a_crc
 	nfc_version
+	nfc_perror
+	nfc_strerror
+	nfc_strerror_r