1 files changed, 3 insertions, 3 deletions

diff --git a/apps/talk.h b/apps/talk.h
index de93b1678c..c4c8bc7285 100644
--- a/apps/talk.h
+++ b/apps/talk.h
@@ -49,7 +49,7 @@ enum {
 
 /* make a "talkable" ID from number + unit
    unit is upper 4 bits, number the remaining (in regular 2's complement) */
-#define TALK_ID(n,u) ((u)<<UNIT_SHIFT | ((n) & ~(-1<<UNIT_SHIFT))) 
+#define TALK_ID(n,u) ((u)<<UNIT_SHIFT | ((n) & ~(-1<<UNIT_SHIFT)))
 
 /* convenience macro to have both virtual pointer and ID as arguments */
 #define STR(id) ID2P(id), id
@@ -61,9 +61,9 @@ extern const char* const dir_thumbnail_name;
 void talk_init(void);
 int talk_buffer_steal(void); /* claim the mp3 buffer e.g. for play/record */
 int talk_id(int id, bool enqueue); /* play a voice ID from voicefont */
-int talk_file(char* filename, bool enqueue); /* play a thumbnail from file */
+int talk_file(const char* filename, bool enqueue); /* play a thumbnail from file */
 int talk_number(int n, bool enqueue); /* say a number */
 int talk_value(int n, int unit, bool enqueue); /* say a numeric value */
-int talk_spell(char* spell, bool enqueue); /* spell a string */
+int talk_spell(const char* spell, bool enqueue); /* spell a string */
 
 #endif /* __TALK_H__ */