1 files changed, 8 insertions, 8 deletions

diff --git a/res/res_speech.c b/res/res_speech.c
index 902955da1..5b8e1a474 100644
--- a/res/res_speech.c
+++ b/res/res_speech.c
@@ -40,7 +40,7 @@ static AST_RWLIST_HEAD_STATIC(engines, ast_speech_engine);
 static struct ast_speech_engine *default_engine = NULL;
 
 /*! \brief Find a speech recognition engine of specified name, if NULL then use the default one */
-static struct ast_speech_engine *find_engine(char *engine_name)
+static struct ast_speech_engine *find_engine(const char *engine_name)
 {
 	struct ast_speech_engine *engine = NULL;
 
@@ -60,25 +60,25 @@ static struct ast_speech_engine *find_engine(char *engine_name)
 }
 
 /*! \brief Activate a loaded (either local or global) grammar */
-int ast_speech_grammar_activate(struct ast_speech *speech, char *grammar_name)
+int ast_speech_grammar_activate(struct ast_speech *speech, const char *grammar_name)
 {
 	return (speech->engine->activate ? speech->engine->activate(speech, grammar_name) : -1);
 }
 
 /*! \brief Deactivate a loaded grammar on a speech structure */
-int ast_speech_grammar_deactivate(struct ast_speech *speech, char *grammar_name)
+int ast_speech_grammar_deactivate(struct ast_speech *speech, const char *grammar_name)
 {
 	return (speech->engine->deactivate ? speech->engine->deactivate(speech, grammar_name) : -1);
 }
 
 /*! \brief Load a local grammar on a speech structure */
-int ast_speech_grammar_load(struct ast_speech *speech, char *grammar_name, char *grammar)
+int ast_speech_grammar_load(struct ast_speech *speech, const char *grammar_name, const char *grammar)
 {
 	return (speech->engine->load ? speech->engine->load(speech, grammar_name, grammar) : -1);
 }
 
 /*! \brief Unload a local grammar from a speech structure */
-int ast_speech_grammar_unload(struct ast_speech *speech, char *grammar_name)
+int ast_speech_grammar_unload(struct ast_speech *speech, const char *grammar_name)
 {
 	return (speech->engine->unload ? speech->engine->unload(speech, grammar_name) : -1);
 }
@@ -163,13 +163,13 @@ int ast_speech_dtmf(struct ast_speech *speech, const char *dtmf)
 }
 
 /*! \brief Change an engine specific attribute */
-int ast_speech_change(struct ast_speech *speech, char *name, const char *value)
+int ast_speech_change(struct ast_speech *speech, const char *name, const char *value)
 {
 	return (speech->engine->change ? speech->engine->change(speech, name, value) : -1);
 }
 
 /*! \brief Create a new speech structure using the engine specified */
-struct ast_speech *ast_speech_new(char *engine_name, int formats)
+struct ast_speech *ast_speech_new(const char *engine_name, int formats)
 {
 	struct ast_speech_engine *engine = NULL;
 	struct ast_speech *new_speech = NULL;
@@ -299,7 +299,7 @@ int ast_speech_register(struct ast_speech_engine *engine)
 }
 
 /*! \brief Unregister a speech recognition engine */
-int ast_speech_unregister(char *engine_name)
+int ast_speech_unregister(const char *engine_name)
 {
 	struct ast_speech_engine *engine = NULL;
 	int res = -1;