diff --git a/src/sfxd.c b/src/sfxd.c
index fd5a318..ca278b1 100644
--- a/src/sfxd.c
+++ b/src/sfxd.c
@@ -52,9 +52,9 @@ void execute_command(struct msg_target tgt, const char *command, const char *par
 bool execute_file(struct msg_target tgt, const char *path, int depth);
 
 bool ipc_init(const char *sock_path);
-void ipc_loop();
+void ipc_loop(void);
 
-bool audio_init();
+bool audio_init(void);
 
 void sfx_pool_clear(void);
 void sfx_pool_grow(int size);
@@ -126,7 +126,7 @@ bool ipc_init(const char *sock_path) {
 }
 
 static char buffer_ipc_loop[BUFFER_SIZE];
-void ipc_loop() {
+void ipc_loop(void) {
   ssize_t data_len;
   socklen_t sl_client = sizeof(ipc.sa_client);
   while ((data_len = recvfrom(ipc.sock_fd, buffer_ipc_loop, sizeof(buffer_ipc_loop) - 1, 0, (struct sockaddr *)&ipc.sa_client, &sl_client)) != -1) {
@@ -145,7 +145,7 @@ void ipc_loop() {
   }
 }
 
-bool audio_init() {
+bool audio_init(void) {
     ma_result result;
     SOFT_EXPECT((result = ma_engine_init(NULL, &audio.engine)), == MA_SUCCESS, false);
     return true;
@@ -190,7 +190,7 @@ void execute_command(struct msg_target tgt, const char *command, const char *par
       send_txt(tgt, "DBG: pool overflow: %d/%d (%.3f%%)\n",
           sounds_pool.use, sounds_pool.cap,
           100.0 * sounds_pool.use / (float)sounds_pool.cap);
-      sfx_pool_grow((int)(sounds_pool.cap * 1.5));
+      sfx_pool_grow(sounds_pool.cap * 2);
     }
 
     send_txt(tgt, "Loading audio key=%s from %s\n", key, path);