diff --git a/common/include/PS2Edefs.h b/common/include/PS2Edefs.h
index acd0ebca82..6e6a78fe37 100644
--- a/common/include/PS2Edefs.h
+++ b/common/include/PS2Edefs.h
@@ -285,6 +285,7 @@ typedef void(CALLBACK *_PADgsDriverInfo)(GSdriverInfo *info);
 typedef s32(CALLBACK *_PADsetSlot)(u8 port, u8 slot);
 typedef s32(CALLBACK *_PADqueryMtap)(u8 port);
 typedef void(CALLBACK *_PADWriteEvent)(keyEvent &evt);
+#endif
 
 #ifdef PLUGINfuncs
 
diff --git a/pcsx2/CMakeLists.txt b/pcsx2/CMakeLists.txt
index 5a01a8068a..7c938f751b 100644
--- a/pcsx2/CMakeLists.txt
+++ b/pcsx2/CMakeLists.txt
@@ -350,7 +350,7 @@ set(pcsx2USBSources
 	USB/usb-mic/usb-mic-logitech.cpp
 	USB/usb-mic/usb-headset.cpp
 	USB/usb-eyetoy/jpgd/jpgd.cpp
-	USB/usb-eyetoy/jo_mpeg.c
+	USB/usb-eyetoy/jo_mpeg.cpp
 	USB/usb-eyetoy/usb-eyetoy-webcam.cpp
 	USB/usb-hid/usb-hid.cpp
 	USB/shared/shared.cpp
diff --git a/pcsx2/IopDma.h b/pcsx2/IopDma.h
index cc3ca31897..bbb9004c66 100644
--- a/pcsx2/IopDma.h
+++ b/pcsx2/IopDma.h
@@ -41,5 +41,3 @@ extern void spu2DMA7Irq();
 
 extern void iopIntcIrq( uint irqType );
 extern void iopTestIntc();
-
-extern USBhandler usbHandler;
diff --git a/pcsx2/USB/USB.cpp b/pcsx2/USB/USB.cpp
index c9d981acf8..8553fce6c8 100644
--- a/pcsx2/USB/USB.cpp
+++ b/pcsx2/USB/USB.cpp
@@ -60,7 +60,6 @@ typedef struct {
 } USBfreezeData;
 
 u8 *ram = 0;
-USBcallback _USBirq;
 FILE *usbLog;
 int64_t usb_frame_time;
 int64_t usb_bit_time;
@@ -83,13 +82,6 @@ Config::Config(): Log(0)
 	memset(&WheelType, 0, sizeof(WheelType));
 }
 
-void USBirq(int cycles)
-{
-	//USB_LOG("USBirq.\n");
-
-	_USBirq(cycles);
-}
-
 void __Log(const char *fmt, ...) {
 	va_list list;
 
@@ -195,7 +187,7 @@ void CreateDevices()
 	}
 }
 
-EXPORT_C_(s32) USBinit() {
+s32 USBinit() {
 	OSDebugOut(TEXT("USBinit\n"));
 
 	RegisterDevice::Register();
@@ -223,7 +215,7 @@ EXPORT_C_(s32) USBinit() {
 	return 0;
 }
 
-EXPORT_C_(void) USBshutdown() {
+void USBshutdown() {
 
 	OSDebugOut(TEXT("USBshutdown\n"));
 	DestroyDevices();
@@ -241,7 +233,7 @@ EXPORT_C_(void) USBshutdown() {
 //#endif
 }
 
-EXPORT_C_(s32) USBopen(void *pDsp) {
+s32 USBopen(void *pDsp) {
 
 	if (conf.Log && !usbLog)
 	{
@@ -299,7 +291,7 @@ EXPORT_C_(s32) USBopen(void *pDsp) {
 	return 0;
 }
 
-EXPORT_C_(void) USBclose() {
+void USBclose() {
 	OSDebugOut(TEXT("USBclose\n"));
 
 	if(usb_device[0] && usb_device[0]->klass.close)
@@ -312,17 +304,17 @@ EXPORT_C_(void) USBclose() {
 
 }
 
-EXPORT_C_(u8) USBread8(u32 addr) {
+u8 USBread8(u32 addr) {
 	USB_LOG("* Invalid 8bit read at address %lx\n", addr);
 	return 0;
 }
 
-EXPORT_C_(u16) USBread16(u32 addr) {
+u16 USBread16(u32 addr) {
 	USB_LOG("* Invalid 16bit read at address %lx\n", addr);
 	return 0;
 }
 
-EXPORT_C_(u32) USBread32(u32 addr) {
+u32 USBread32(u32 addr) {
 	u32 hard;
 
 	hard=ohci_mem_read(qemu_ohci,addr);
@@ -332,42 +324,27 @@ EXPORT_C_(u32) USBread32(u32 addr) {
 	return hard;
 }
 
-EXPORT_C_(void) USBwrite8(u32 addr,  u8 value) {
+void USBwrite8(u32 addr,  u8 value) {
 	USB_LOG("* Invalid 8bit write at address %lx value %x\n", addr, value);
 }
 
-EXPORT_C_(void) USBwrite16(u32 addr, u16 value) {
+void USBwrite16(u32 addr, u16 value) {
 	USB_LOG("* Invalid 16bit write at address %lx value %x\n", addr, value);
 }
 
-EXPORT_C_(void) USBwrite32(u32 addr, u32 value) {
+void USBwrite32(u32 addr, u32 value) {
 	USB_LOG("* Known 32bit write at address %lx value %lx\n", addr, value);
 	ohci_mem_write(qemu_ohci,addr,value);
 }
 
-EXPORT_C_(void) USBirqCallback(USBcallback callback) {
-	_USBirq = callback;
-}
-
 extern u32 bits;
 
-EXPORT_C_(int) _USBirqHandler(void)
-{
-	//fprintf(stderr," * USB: IRQ Acknowledged.\n");
-	//qemu_ohci->intr_status&=~bits;
-	return 1;
-}
-
-EXPORT_C_(USBhandler) USBirqHandler(void) {
-	return (USBhandler)_USBirqHandler;
-}
-
-EXPORT_C_(void) USBsetRAM(void *mem) {
+void USBsetRAM(void *mem) {
 	ram = (u8*)mem;
 	Reset();
 }
 
-EXPORT_C_(s32) USBfreeze(int mode, freezeData *data) {
+s32 USBfreeze(int mode, freezeData *data) {
 	USBfreezeData usbd = { 0 };
 
 	//TODO FREEZE_SIZE mismatch causes loading to fail in PCSX2 beforehand
@@ -608,7 +585,7 @@ EXPORT_C_(s32) USBfreeze(int mode, freezeData *data) {
 	return 0;
 }
 
-EXPORT_C_(void) USBasync(u32 cycles)
+void USBasync(u32 cycles)
 {
 	remaining += cycles;
 	clocks += remaining;
@@ -643,10 +620,6 @@ EXPORT_C_(void) USBasync(u32 cycles)
 	//}
 }
 
-EXPORT_C_(s32) USBtest() {
-	return 0;
-}
-
 int cpu_physical_memory_rw(u32 addr, u8 *buf, size_t len, int is_write)
 {
 	//OSDebugOut(TEXT("%s addr %08X, len %d\n"), is_write ? TEXT("write") : TEXT("read "), addr, len);
diff --git a/pcsx2/USB/USB.h b/pcsx2/USB/USB.h
index f46022b07f..435c63e060 100644
--- a/pcsx2/USB/USB.h
+++ b/pcsx2/USB/USB.h
@@ -18,9 +18,6 @@
 
 #pragma once
 
-#ifndef __PS2USB_H__
-#define __PS2USB_H__
-
 #include <cstdio>
 #include <cstring>
 #include <string>
@@ -36,12 +33,26 @@ extern u8 *ram;
 
 // ---------------------------------------------------------------------
 
-extern USBcallback _USBirq;
-void USBirq(int);
-
 void DestroyDevices();
 void CreateDevices();
 
+s32 USBinit();
+void USBasync(u32 cycles);
+void USBshutdown();
+void USBclose();
+s32 USBopen(void *pDsp);
+s32 USBfreeze(int mode, freezeData *data);
+
+u8 USBread8(u32 addr);
+u16 USBread16(u32 addr);
+u32 USBread32(u32 addr);
+void USBwrite8(u32 addr,  u8 value);
+void USBwrite16(u32 addr, u16 value);
+void USBwrite32(u32 addr, u32 value);
+
+
+void USBsetRAM(void *mem);
+
 extern FILE *usbLog;
 s64 get_clock();
 
@@ -55,4 +66,3 @@ void UninitWindow();
 # endif
 #endif
 
-#endif
diff --git a/pcsx2/USB/usb-eyetoy/jo_mpeg.c b/pcsx2/USB/usb-eyetoy/jo_mpeg.cpp
similarity index 100%
rename from pcsx2/USB/usb-eyetoy/jo_mpeg.c
rename to pcsx2/USB/usb-eyetoy/jo_mpeg.cpp