diff --git a/makefile b/makefile
index c2d9530..2331e1c 100644
--- a/makefile
+++ b/makefile
@@ -4,7 +4,7 @@ NAME = sdl_template
 CC := clang
 STD := c17
 LANG = c
-CFLAGS := $(shell pkg-config --cflags sdl2) -Wall -g -pedantic
+CFLAGS := $(shell pkg-config --cflags sdl2) -O3 -g -Wall -Wall -Wextra -Wpedantic -Wno-pointer-arith
 LDFLAGS := $(shell pkg-config --libs sdl2) -lm
 
 # dirs
diff --git a/src/window/audio.c b/src/window/audio.c
index a3d633f..366139c 100644
--- a/src/window/audio.c
+++ b/src/window/audio.c
@@ -30,7 +30,7 @@ static void audio_mixer(void* userdata, uint8_t* stream, int32_t len) {
         }
 
         // get the length of which we shall be mixing
-        uint32_t mix_length = SDL_min(audio[i].length, len);
+        uint32_t mix_length = SDL_min(audio[i].length, (uint32_t)len);
 
         // mix the audio with the stream
         SDL_MixAudioFormat(stream, audio[i].buffer, device->format, mix_length, SDL_MIX_MAXVOLUME);
@@ -78,7 +78,7 @@ AudioDevice* audio_device_init(const int32_t freq, const SDL_AudioFormat format,
     AudioDevice* audio_device = malloc(sizeof(AudioDevice));
 
     // define the audio specification
-    SDL_AudioSpec spec = {freq, format, channels, samples};
+    SDL_AudioSpec spec = {freq, format, channels, 0, samples, 0, 0, NULL, NULL};
     spec.callback = audio_mixer;
     spec.userdata = audio_device;