diff --git a/libnfc/drivers/acr122s.c b/libnfc/drivers/acr122s.c
index 4665053..407e4c9 100644
--- a/libnfc/drivers/acr122s.c
+++ b/libnfc/drivers/acr122s.c
@@ -497,7 +497,6 @@ acr122s_close(nfc_device *pnd)
   close(DRIVER_DATA(pnd)->abort_fds[1]);
 #endif
 
-  free(DRIVER_DATA(pnd)->port);
   pn53x_data_free(pnd);
   nfc_device_free(pnd);
 }
diff --git a/libnfc/drivers/arygon.c b/libnfc/drivers/arygon.c
index dc52ad9..f34558e 100644
--- a/libnfc/drivers/arygon.c
+++ b/libnfc/drivers/arygon.c
@@ -187,7 +187,6 @@ arygon_close(nfc_device *pnd)
   close(DRIVER_DATA(pnd)->iAbortFds[1]);
 #endif
 
-  free(DRIVER_DATA(pnd)->port);
   pn53x_data_free(pnd);
   nfc_device_free(pnd);
 }
diff --git a/libnfc/drivers/pn532_uart.c b/libnfc/drivers/pn532_uart.c
index 409b2e7..0beb8a6 100644
--- a/libnfc/drivers/pn532_uart.c
+++ b/libnfc/drivers/pn532_uart.c
@@ -160,7 +160,6 @@ pn532_uart_close(nfc_device *pnd)
   close(DRIVER_DATA(pnd)->iAbortFds[1]);
 #endif
 
-  free(DRIVER_DATA(pnd)->port);
   pn53x_data_free(pnd);
   nfc_device_free(pnd);
 }