diff --git a/Source/Plugins/Plugin_DSP_LLE/Src/DSPSymbols.cpp b/Source/Plugins/Plugin_DSP_LLE/Src/DSPSymbols.cpp
index 0e9ae712fe..8624436daf 100644
--- a/Source/Plugins/Plugin_DSP_LLE/Src/DSPSymbols.cpp
+++ b/Source/Plugins/Plugin_DSP_LLE/Src/DSPSymbols.cpp
@@ -178,7 +178,7 @@ bool ReadAnnotatedAssembly(const char *filename)
 		// Scan for function starts
 		if (!memcmp(line, "void", 4)) {
 			char temp[256];
-			for (int i = 6; i < len; i++) {
+			for (size_t i = 6; i < len; i++) {
 				if (line[i] == '(') {
 					// Yep, got one.
 					memcpy(temp, line + 5, i - 5);
@@ -197,7 +197,7 @@ bool ReadAnnotatedAssembly(const char *filename)
 		}
 
 		// Scan for braces
-		for (int i = 0; i < (int)len; i++) {
+		for (size_t i = 0; i < len; i++) {
 			if (line[i] == '{')
 				brace_count++;
 			if (line[i] == '}')
diff --git a/Source/Plugins/Plugin_VideoDX9/Src/Render.cpp b/Source/Plugins/Plugin_VideoDX9/Src/Render.cpp
index 9547fda125..1c5a564778 100644
--- a/Source/Plugins/Plugin_VideoDX9/Src/Render.cpp
+++ b/Source/Plugins/Plugin_VideoDX9/Src/Render.cpp
@@ -123,7 +123,7 @@ bool Renderer::Init()
 
 	sscanf(g_Config.cFSResolution, "%dx%d", &w_temp, &h_temp);
 
-	for (fullScreenRes = 0; fullScreenRes < D3D::GetAdapter(g_ActiveConfig.iAdapter).resolutions.size(); fullScreenRes++)
+	for (fullScreenRes = 0; fullScreenRes < (int)D3D::GetAdapter(g_ActiveConfig.iAdapter).resolutions.size(); fullScreenRes++)
 	{
 		if ((D3D::GetAdapter(g_ActiveConfig.iAdapter).resolutions[fullScreenRes].xres == w_temp) && 
 			(D3D::GetAdapter(g_ActiveConfig.iAdapter).resolutions[fullScreenRes].yres == h_temp))
diff --git a/Source/Plugins/Plugin_VideoDX9/Src/resource.h b/Source/Plugins/Plugin_VideoDX9/Src/resource.h
index d8ccc10252..ef7fb34e98 100644
--- a/Source/Plugins/Plugin_VideoDX9/Src/resource.h
+++ b/Source/Plugins/Plugin_VideoDX9/Src/resource.h
@@ -1534,11 +1534,8 @@
 #define SC_CONTEXTHELP                  0xF180
 #define LVS_TYPESTYLEMASK               0xfc00
 #define SPVERSION_MASK                  0x0000FF00
-#define HTERROR                         -2
 #define IDC_STATIC                      -1
 #define UNICODE_NOCHAR                  0xFFFF
-#define PWR_FAIL                        -1
-#define HTTRANSPARENT                   -1
 
 // Next default values for new objects
 // 
diff --git a/Source/Plugins/Plugin_VideoOGL/Src/DLCache.cpp b/Source/Plugins/Plugin_VideoOGL/Src/DLCache.cpp
index ac277d44a2..5c3fc856d3 100644
--- a/Source/Plugins/Plugin_VideoOGL/Src/DLCache.cpp
+++ b/Source/Plugins/Plugin_VideoOGL/Src/DLCache.cpp
@@ -406,7 +406,7 @@ bool CompileAndRunDisplayList(u32 address, int size, CachedDisplayList *dl)
 				emitter.MOV(64, R(RAX), Imm64(pre_draw_video_data));
 				emitter.MOV(64, M(&g_pVideoData), R(RAX));
 #else
-				emitter.MOV(32, R(EAX), Imm32(pre_draw_video_data));
+				emitter.MOV(32, R(EAX), Imm32((u32)pre_draw_video_data));
 				emitter.MOV(32, M(&g_pVideoData), R(EAX));
 #endif
 				emitter.ABI_CallFunctionCCC(