diff --git a/Core/CwCheat.cpp b/Core/CwCheat.cpp
index bdc314a31c..4610dd2c3d 100644
--- a/Core/CwCheat.cpp
+++ b/Core/CwCheat.cpp
@@ -521,7 +521,7 @@ void CWCheatEngine::Run() {
 			case 0xC: // Code stopper
 				if (Memory::IsValidAddress(addr)) { 
 					value = Memory::Read_U32(addr);
-					if (value != arg) {
+					if ((u32)value != arg) {
 						SkipAllCodes();
 					}
 				}
diff --git a/Core/HLE/ReplaceTables.cpp b/Core/HLE/ReplaceTables.cpp
index 764125921f..4ca5d139c3 100644
--- a/Core/HLE/ReplaceTables.cpp
+++ b/Core/HLE/ReplaceTables.cpp
@@ -418,11 +418,11 @@ int GetReplacementFuncIndex(u64 hash, int funcSize) {
 	}
 
 	// TODO: Build a lookup and keep it around
-	for (int i = 0; i < ARRAY_SIZE(entries); i++) {
+	for (size_t i = 0; i < ARRAY_SIZE(entries); i++) {
 		if (!entries[i].name)
 			continue;
 		if (!strcmp(name, entries[i].name)) {
-			return i;
+			return (int)i;
 		}
 	}
 	return -1;
diff --git a/Core/HLE/proAdhoc.cpp b/Core/HLE/proAdhoc.cpp
index cd8a7a4de2..7d74318783 100644
--- a/Core/HLE/proAdhoc.cpp
+++ b/Core/HLE/proAdhoc.cpp
@@ -546,27 +546,30 @@ int initNetwork(SceNetAdhocctlAdhocId *adhoc_id){
   server_addr.sin_family = AF_INET;
   server_addr.sin_port = htons(27312); // Maybe read this from config too
 
-  // Resolve dns 
-  addrinfo * resultAddr;
+	// Resolve dns
+	addrinfo * resultAddr;
     addrinfo * ptr;
     in_addr serverIp;
-  iResult = getaddrinfo(g_Config.proAdhocServer.c_str(),0,NULL,&resultAddr);
-  if(iResult !=  0){
-    ERROR_LOG(SCENET, "Dns error\n");
-    return iResult;
+	serverIp.s_addr = INADDR_NONE;
+
+	iResult = getaddrinfo(g_Config.proAdhocServer.c_str(),0,NULL,&resultAddr);
+	if (iResult != 0) {
+		ERROR_LOG(SCENET, "Dns error\n");
+		return iResult;
 	}
-	for(ptr = resultAddr; ptr != NULL; ptr = ptr->ai_next){
-		switch(ptr->ai_family){
+	for (ptr = resultAddr; ptr != NULL; ptr = ptr->ai_next) {
+		switch (ptr->ai_family) {
 		case AF_INET:
 			serverIp = ((sockaddr_in *)ptr->ai_addr)->sin_addr;
+			break;
 		}
 	}
 	server_addr.sin_addr = serverIp;
 	iResult = connect(metasocket,(sockaddr *)&server_addr,sizeof(server_addr));
-	if(iResult == SOCKET_ERROR){
+	if (iResult == SOCKET_ERROR) {
 		ERROR_LOG(SCENET,"Socket error");
-    return iResult;
-  }
+		return iResult;
+	}
   memset(&parameter,0,sizeof(parameter));
   strcpy((char *)&parameter.nickname.data, g_Config.sNickName.c_str());
   parameter.channel = 1; // Fake Channel 1
diff --git a/Core/HLE/sceMp3.cpp b/Core/HLE/sceMp3.cpp
index c57df90bb5..5c2d517f82 100644
--- a/Core/HLE/sceMp3.cpp
+++ b/Core/HLE/sceMp3.cpp
@@ -181,7 +181,7 @@ int sceMp3Decode(u32 mp3, u32 outPcmPtr) {
 			break;
 
 		if (packet.stream_index == ctx->audio_stream_index) {
-			avcodec_get_frame_defaults(&frame);
+			av_frame_unref(&frame);
 			got_frame = 0;
 			ret = avcodec_decode_audio4(ctx->decoder_context, &frame, &got_frame, &packet);
 			if (ret < 0) {
diff --git a/Core/HW/SimpleAT3Dec.cpp b/Core/HW/SimpleAT3Dec.cpp
index d41220036c..2ba87ea63b 100644
--- a/Core/HW/SimpleAT3Dec.cpp
+++ b/Core/HW/SimpleAT3Dec.cpp
@@ -121,7 +121,7 @@ bool SimpleAT3::Decode(void* inbuf, int inbytes, uint8_t *outbuf, int *outbytes)
 	*outbytes = 0;
 
 	int got_frame = 0;
-	avcodec_get_frame_defaults(frame_);
+	av_frame_unref(frame_);
 
 	int len = avcodec_decode_audio4(codecCtx_, frame_, &got_frame, &packet);
 	if (len < 0) {
diff --git a/Core/MIPS/MIPSAnalyst.cpp b/Core/MIPS/MIPSAnalyst.cpp
index 7f013d5768..f5b95baa4e 100644
--- a/Core/MIPS/MIPSAnalyst.cpp
+++ b/Core/MIPS/MIPSAnalyst.cpp
@@ -588,7 +588,7 @@ skip:
 
 	const char *LookupHash(u64 hash, int funcsize) {
 		for (auto it = hashMap.begin(), end = hashMap.end(); it != end; ++it) {
-			if (it->hash == hash && it->size == funcsize) {
+			if (it->hash == hash && (int)it->size == funcsize) {
 				return it->name;
 			}
 		}
diff --git a/Core/PSPLoaders.cpp b/Core/PSPLoaders.cpp
index 3c2a84e85e..22ba595a53 100644
--- a/Core/PSPLoaders.cpp
+++ b/Core/PSPLoaders.cpp
@@ -150,7 +150,7 @@ bool Load_PSP_ISO(const char *filename, std::string *error_string)
 	std::string bootpath("disc0:/PSP_GAME/SYSDIR/EBOOT.BIN");
 
 	// Bypass Chinese translation patches, see comment above.
-	for (int i = 0; i < ARRAY_SIZE(altBootNames); i++) {
+	for (size_t i = 0; i < ARRAY_SIZE(altBootNames); i++) {
 		if (pspFileSystem.GetFileInfo(altBootNames[i]).exists) {
 			bootpath = altBootNames[i];			
 		}
diff --git a/GPU/GLES/TextureCache.cpp b/GPU/GLES/TextureCache.cpp
index 50f472fc4a..aae7b36d1a 100644
--- a/GPU/GLES/TextureCache.cpp
+++ b/GPU/GLES/TextureCache.cpp
@@ -1130,6 +1130,7 @@ void TextureCache::SetTexture(bool force) {
 			break;
 		}
 
+#ifndef USING_GLES2
 		if (i > 0) {
 			int tw = gstate.getTextureWidth(i);
 			int th = gstate.getTextureWidth(i);
@@ -1138,6 +1139,7 @@ void TextureCache::SetTexture(bool force) {
 			else if (th != 1 && th != (gstate.getTextureHeight(i - 1) >> 1))
 				badMipSizes = true;
 		}
+#endif
 	}
 
 	// In addition, simply don't load more than level 0 if g_Config.bMipMap is false.
@@ -1181,7 +1183,7 @@ void TextureCache::SetTexture(bool force) {
 #ifndef USING_GLES2
 		if (badMipSizes) {
 			glGenerateMipmap(GL_TEXTURE_2D);
-		}	else {
+		} else {
 			for (int i = 1; i <= maxLevel; i++) {
 				LoadTextureLevel(*entry, i, replaceImages, dstFmt);
 			}