diff --git a/3rdparty/portmidi/pm_common/pminternal.h b/3rdparty/portmidi/pm_common/pminternal.h
index 2aea2fd18dc..80efbb07f64 100644
--- a/3rdparty/portmidi/pm_common/pminternal.h
+++ b/3rdparty/portmidi/pm_common/pminternal.h
@@ -160,7 +160,7 @@ PmTimestamp none_synchronize(PmInternal *midi);
 PmError pm_fail_fn(PmInternal *midi);
 PmError pm_fail_timestamp_fn(PmInternal *midi, PmTimestamp timestamp);
 PmError pm_success_fn(PmInternal *midi);
-PmError pm_add_interf(char *interf, pm_create_fn create_fn,
+PmError pm_add_interf(const char *interf, pm_create_fn create_fn,
                       pm_delete_fn delete_fn);
 PmError pm_add_device(const char *interf, const char *name, int is_input,
                       int is_virtual, void *descriptor, pm_fns_type dictionary);
diff --git a/3rdparty/portmidi/pm_common/portmidi.c b/3rdparty/portmidi/pm_common/portmidi.c
index f3f425df340..7c906dcae42 100644
--- a/3rdparty/portmidi/pm_common/portmidi.c
+++ b/3rdparty/portmidi/pm_common/portmidi.c
@@ -121,7 +121,7 @@ static int pm_interf_list_len = 0;
  * returns pmInsufficientMemor if interface memory is
  * exceeded, otherwise returns pmNoError.
  */
-PmError pm_add_interf(char *interf, pm_create_fn create_fn,
+PmError pm_add_interf(const char *interf, pm_create_fn create_fn,
                       pm_delete_fn delete_fn)
 {
     if (pm_interf_list_len >= MAX_INTERF) {