diff --git a/Source/Core/AudioCommon/Src/NullSoundStream.h b/Source/Core/AudioCommon/Src/NullSoundStream.h
index 830e1c8400..a20c1e0d12 100644
--- a/Source/Core/AudioCommon/Src/NullSoundStream.h
+++ b/Source/Core/AudioCommon/Src/NullSoundStream.h
@@ -6,6 +6,7 @@
 #define _NULLSOUNDSTREAM_H_
 
 #include "SoundStream.h"
+#include "Thread.h"
 
 #define BUF_SIZE (48000 * 4 / 32)
 
diff --git a/Source/Core/Common/Src/DebugInterface.h b/Source/Core/Common/Src/DebugInterface.h
index 81b2d0852b..317cd0bb43 100644
--- a/Source/Core/Common/Src/DebugInterface.h
+++ b/Source/Core/Common/Src/DebugInterface.h
@@ -2,6 +2,7 @@
 #define _DEBUGINTERFACE_H
 
 #include <string>
+#include <string.h>
 
 class DebugInterface
 {
diff --git a/Source/Core/Core/Src/HW/EXI_Device.h b/Source/Core/Core/Src/HW/EXI_Device.h
index 8cb3aee188..e2a39154f5 100644
--- a/Source/Core/Core/Src/HW/EXI_Device.h
+++ b/Source/Core/Core/Src/HW/EXI_Device.h
@@ -5,6 +5,7 @@
 #ifndef _EXIDEVICE_H
 #define _EXIDEVICE_H
 
+#include "Common.h"
 #include "ChunkFile.h"
 
 enum TEXIDevices
diff --git a/Source/Core/InputCommon/Src/GCPadStatus.h b/Source/Core/InputCommon/Src/GCPadStatus.h
index 94abef01e2..c94f0b7fe8 100644
--- a/Source/Core/InputCommon/Src/GCPadStatus.h
+++ b/Source/Core/InputCommon/Src/GCPadStatus.h
@@ -5,6 +5,8 @@
 #ifndef _GCPAD_H_INCLUDED__
 #define _GCPAD_H_INCLUDED__
 
+#include "CommonTypes.h"
+
 #define PAD_ERR_NONE            0
 #define PAD_ERR_NO_CONTROLLER   -1
 #define PAD_ERR_NOT_READY       -2