diff --git a/libmapper/mapper.h b/libmapper/mapper.h
index 854f40c..5b596a6 100644
--- a/libmapper/mapper.h
+++ b/libmapper/mapper.h
@@ -4,19 +4,21 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
-typedef enum mapper_operation { MAPPER_OP_REMOVE = 1 } mapper_operation;
+typedef enum mapper_operation
+{
+    MAPPER_OP_REMOVE = 1
+} mapper_operation;
 typedef struct mapper_async_wait mapper_async_wait;
 typedef struct mapper_async_subtree mapper_async_subtree;
-void mapper_wait_async_free(mapper_async_wait *);
-void mapper_subtree_async_free(mapper_async_subtree *);
+void mapper_wait_async_free(mapper_async_wait*);
+void mapper_subtree_async_free(mapper_async_subtree*);
 
-int mapper_wait_async(sd_bus *, sd_event *, char *[], void (*)(int, void *),
-                      void *, mapper_async_wait **);
-int mapper_subtree_async(sd_bus *, sd_event *, char *, char *,
-                         void (*)(int, void *), void *, mapper_async_subtree **,
-                         int);
-int mapper_get_service(sd_bus *conn, const char *obj, char **service);
-int mapper_get_object(sd_bus *conn, const char *obj, sd_bus_message **reply);
+int mapper_wait_async(sd_bus*, sd_event*, char* [], void (*)(int, void*), void*,
+                      mapper_async_wait**);
+int mapper_subtree_async(sd_bus*, sd_event*, char*, char*, void (*)(int, void*),
+                         void*, mapper_async_subtree**, int);
+int mapper_get_service(sd_bus* conn, const char* obj, char** service);
+int mapper_get_object(sd_bus* conn, const char* obj, sd_bus_message** reply);
 #ifdef __cplusplus
 }
 #endif