diff --git a/Core/SoundMixer.cpp b/Core/SoundMixer.cpp
index ff76ce45..32c0c5bb 100644
--- a/Core/SoundMixer.cpp
+++ b/Core/SoundMixer.cpp
@@ -87,7 +87,7 @@ void SoundMixer::PlayAudioBuffer(uint32_t time)
 	if(_hasPanning) {
 		blip_read_samples(_blipBufRight, _outputBuffer + 1, SoundMixer::MaxSamplesPerFrame, 1);
 	} else {
-		for(int i = 0; i < sampleCount * 2; i+=2) {
+		for(size_t i = 0; i < sampleCount * 2; i+=2) {
 			_outputBuffer[i + 1] = _outputBuffer[i];
 		}
 	}
diff --git a/Core/iNesLoader.cpp b/Core/iNesLoader.cpp
index 856d14bb..a84917b2 100644
--- a/Core/iNesLoader.cpp
+++ b/Core/iNesLoader.cpp
@@ -47,7 +47,7 @@ RomData iNesLoader::LoadRom(vector<uint8_t>& romFile, NESHeader *preloadedHeader
 		buffer += 512;
 	}
 
-	int bytesRead = buffer - romFile.data();
+	size_t bytesRead = buffer - romFile.data();
 
 	uint32_t romCrc = CRC32::GetCRC(buffer, romFile.size() - bytesRead);
 	romData.PrgChrCrc32 = romCrc;