diff --git a/common/src/Utilities/AlignedMalloc.cpp b/common/src/Utilities/AlignedMalloc.cpp
index 06ff8bd989..2a56355c4d 100644
--- a/common/src/Utilities/AlignedMalloc.cpp
+++ b/common/src/Utilities/AlignedMalloc.cpp
@@ -95,7 +95,7 @@ __fi void _memset16_unaligned( void* dest, u16 data, size_t size )
 		*dst = data;
 }
 
-__fi void HostSys::Munmap( void* base, u32 size )
+__fi void HostSys::Munmap( void* base, size_t size )
 {
 	Munmap( (uptr)base, size );
 }
diff --git a/common/src/Utilities/HashTools.cpp b/common/src/Utilities/HashTools.cpp
index c5c3ad3061..8ffdb0255e 100644
--- a/common/src/Utilities/HashTools.cpp
+++ b/common/src/Utilities/HashTools.cpp
@@ -29,16 +29,7 @@ namespace HashTools {
 /// <seealso cref="CommonHashClass"/>
 const CommonHashClass GetCommonHash;
 
-#undef get16bits
-#if (defined(__GNUC__) && defined(__i386__)) || defined(__WATCOMC__) \
-  || defined(_MSC_VER) || defined (__BORLANDC__) || defined (__TURBOC__)
 #define get16bits(d) (*((const u16 *) (d)))
-#endif
-
-#if !defined (get16bits)
-#define get16bits(d) ((((u32)(((const ubyte *)(d))[1])) << 8)\
-					   +(u32)(((const ubyte *)(d))[0]) )
-#endif
 
 /// <summary>
 ///   Calculates a hash value for an arbitrary set of binary data.
diff --git a/common/src/Utilities/VirtualMemory.cpp b/common/src/Utilities/VirtualMemory.cpp
index 2e8742354e..a0cfb50c41 100644
--- a/common/src/Utilities/VirtualMemory.cpp
+++ b/common/src/Utilities/VirtualMemory.cpp
@@ -455,7 +455,7 @@ SpatialArrayReserve& SpatialArrayReserve::SetBlockSizeInPages( uint pages )
 //
 // This method must be called prior to accessing or modifying the array contents.  Calls to
 // a modified buffer will be ignored (and generate an assertion in dev/debug modes).
-uint SpatialArrayReserve::SetBlockSize( uint bytes )
+uptr SpatialArrayReserve::SetBlockSize( uptr bytes )
 {
 	SetBlockSizeInPages((bytes + __pagesize - 1) / __pagesize);
 	return m_blocksize * __pagesize;
diff --git a/pcsx2/CDVD/CDVD.cpp b/pcsx2/CDVD/CDVD.cpp
index e976d7811b..c071959a34 100644
--- a/pcsx2/CDVD/CDVD.cpp
+++ b/pcsx2/CDVD/CDVD.cpp
@@ -502,7 +502,6 @@ s32 cdvdReadSubQ(s32 lsn, cdvdSubQ* subq)
 
 static void cdvdDetectDisk()
 {
-	wxString str;
 	cdvd.Type = DoCDVDdetectDiskType();
 	cdvdReloadElfInfo();
 }
diff --git a/pcsx2/DebugTools/DisR5900asm.cpp b/pcsx2/DebugTools/DisR5900asm.cpp
index ecef2735ef..01dd2b27dc 100644
--- a/pcsx2/DebugTools/DisR5900asm.cpp
+++ b/pcsx2/DebugTools/DisR5900asm.cpp
@@ -607,9 +607,6 @@ void (*COP2SPECIAL2PrintTable[128])( string& output ) =
 
 void disR5900Fasm( string& output, u32 code, u32 pc )
 {
-	string dbuf;
-	char obuf[48];
-
 	opcode_addr = pc;
 	disasmOpcode = code;