diff --git a/lib/internal.h b/lib/internal.h
index e3005d58..770fc9fe 100644
--- a/lib/internal.h
+++ b/lib/internal.h
@@ -56,7 +56,6 @@ int crypt_confirm(struct crypt_device *cd, const char *msg);
 void set_error_va(const char *fmt, va_list va);
 void set_error(const char *fmt, ...);
 const char *get_error(void);
-void set_debug_level(int level);
 
 int init_crypto(struct crypt_device *ctx);
 struct hash_backend *get_hash_backend(const char *name);
diff --git a/src/cryptsetup.c b/src/cryptsetup.c
index 666b4fe4..170d1763 100644
--- a/src/cryptsetup.c
+++ b/src/cryptsetup.c
@@ -826,7 +826,7 @@ static void help(poptContext popt_context, enum poptCallbackReason reason,
 
 		for(action = action_types; action->type; action++)
 			log_std("\t%s %s - %s\n", action->type, _(action->arg_desc), _(action->desc));
-		
+
 		log_std(_("\n"
 			 "<name> is the device to create under %s\n"
 			 "<device> is the encrypted device\n"
@@ -845,8 +845,6 @@ static void help(poptContext popt_context, enum poptCallbackReason reason,
 		usage(popt_context, EXIT_SUCCESS, NULL, NULL);
 }
 
-void set_debug_level(int level);
-
 static void _dbg_version_and_cmd(int argc, char **argv)
 {
 	int i;