diff --git a/drivers/iio/adc/stx104.c b/drivers/iio/adc/stx104.c
index be2de48844bc..7dd396f88f6b 100644
--- a/drivers/iio/adc/stx104.c
+++ b/drivers/iio/adc/stx104.c
@@ -49,7 +49,7 @@
 
 static unsigned int base[max_num_isa_dev(STX104_EXTENT)];
 static unsigned int num_stx104;
-module_param_array(base, uint, &num_stx104, 0);
+module_param_hw_array(base, uint, ioport, &num_stx104, 0);
 MODULE_PARM_DESC(base, "Apex Embedded Systems STX104 base addresses");
 
 /**
diff --git a/drivers/iio/dac/cio-dac.c b/drivers/iio/dac/cio-dac.c
index 5a743e2a779d..dac086129edf 100644
--- a/drivers/iio/dac/cio-dac.c
+++ b/drivers/iio/dac/cio-dac.c
@@ -39,7 +39,7 @@
 
 static unsigned int base[max_num_isa_dev(CIO_DAC_EXTENT)];
 static unsigned int num_cio_dac;
-module_param_array(base, uint, &num_cio_dac, 0);
+module_param_hw_array(base, uint, ioport, &num_cio_dac, 0);
 MODULE_PARM_DESC(base, "Measurement Computing CIO-DAC base addresses");
 
 /**