diff --git a/libretro-common/audio/audio_mixer.c b/libretro-common/audio/audio_mixer.c
index 2af2521a3b..efe78e585d 100644
--- a/libretro-common/audio/audio_mixer.c
+++ b/libretro-common/audio/audio_mixer.c
@@ -242,7 +242,7 @@ void audio_mixer_done(void)
       s_voices[i].type = AUDIO_MIXER_TYPE_NONE;
 }
 
-audio_mixer_sound_t* audio_mixer_load_wav(const char* path, void *buffer, ssize_t size)
+audio_mixer_sound_t* audio_mixer_load_wav(const char* path, void *buffer, int32_t size)
 {
    /* WAV data */
    rwav_t wav;
@@ -289,7 +289,7 @@ audio_mixer_sound_t* audio_mixer_load_wav(const char* path, void *buffer, ssize_
    return sound;
 }
 
-audio_mixer_sound_t* audio_mixer_load_ogg(const char* path, void *buffer, ssize_t size)
+audio_mixer_sound_t* audio_mixer_load_ogg(const char* path, void *buffer, int32_t size)
 {
 #ifdef HAVE_STB_VORBIS
    audio_mixer_sound_t* sound = (audio_mixer_sound_t*)calloc(1, sizeof(*sound));
diff --git a/libretro-common/include/audio/audio_mixer.h b/libretro-common/include/audio/audio_mixer.h
index 47c351130d..7f372eccbc 100644
--- a/libretro-common/include/audio/audio_mixer.h
+++ b/libretro-common/include/audio/audio_mixer.h
@@ -46,8 +46,8 @@ void audio_mixer_init(unsigned rate);
 
 void audio_mixer_done(void);
 
-audio_mixer_sound_t* audio_mixer_load_wav(const char* path, void *buffer, ssize_t size);
-audio_mixer_sound_t* audio_mixer_load_ogg(const char* path, void *buffer, ssize_t size);
+audio_mixer_sound_t* audio_mixer_load_wav(const char* path, void *buffer, int32_t size);
+audio_mixer_sound_t* audio_mixer_load_ogg(const char* path, void *buffer, int32_t size);
 
 void audio_mixer_destroy(audio_mixer_sound_t* sound);