diff --git a/Source/Core/Core/Src/HW/WiimoteReal/IODummy.cpp b/Source/Core/Core/Src/HW/WiimoteReal/IODummy.cpp
index ada6237756..57034ff09a 100644
--- a/Source/Core/Core/Src/HW/WiimoteReal/IODummy.cpp
+++ b/Source/Core/Core/Src/HW/WiimoteReal/IODummy.cpp
@@ -72,7 +72,7 @@ int Wiimote::IORead(u8* buf)
 	return 0;
 }
 
-int Wiimote::IOWrite(const u8* buf, int len)
+int Wiimote::IOWrite(const u8* buf, size_t len)
 {
 	return 0;
 }
diff --git a/Source/Core/Core/Src/HW/WiimoteReal/IONix.cpp b/Source/Core/Core/Src/HW/WiimoteReal/IONix.cpp
index 860a9a3d57..0f4fe5e730 100644
--- a/Source/Core/Core/Src/HW/WiimoteReal/IONix.cpp
+++ b/Source/Core/Core/Src/HW/WiimoteReal/IONix.cpp
@@ -263,9 +263,9 @@ int Wiimote::IORead(u8* buf)
 	return r;
 }
 
-int Wiimote::IOWrite(u8 const* buf, int len)
+int Wiimote::IOWrite(u8 const* buf, size_t len)
 {
-	return write(int_sock, buf, len);
+	return write(int_sock, buf, (int)len);
 }
 
 }; // WiimoteReal