1 files changed, 4 insertions, 4 deletions

diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index 3f08afc0f0d3..c8e402fc3782 100644
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -896,11 +896,11 @@ struct hdspm {
         unsigned char max_channels_in;
         unsigned char max_channels_out;
 
-        char *channel_map_in;
-        char *channel_map_out;
+        signed char *channel_map_in;
+        signed char *channel_map_out;
 
-        char *channel_map_in_ss, *channel_map_in_ds, *channel_map_in_qs;
-        char *channel_map_out_ss, *channel_map_out_ds, *channel_map_out_qs;
+        signed char *channel_map_in_ss, *channel_map_in_ds, *channel_map_in_qs;
+        signed char *channel_map_out_ss, *channel_map_out_ds, *channel_map_out_qs;
 
         char **port_names_in;
         char **port_names_out;