diff --git a/pcsx2/CDVD/InputIsoFile.cpp b/pcsx2/CDVD/InputIsoFile.cpp
index 2e24817b48..ca0b3dd010 100644
--- a/pcsx2/CDVD/InputIsoFile.cpp
+++ b/pcsx2/CDVD/InputIsoFile.cpp
@@ -90,7 +90,8 @@ void InputIsoFile::BeginRead2(uint lsn)
 
 int InputIsoFile::FinishRead3(u8* dst, uint mode)
 {
-	int _offset, length;
+	int _offset = 0;
+	int length = 0;
 	int ret = 0;
 
 	if(m_current_lsn < 0)
diff --git a/pcsx2/CDVD/IsoFS/IsoFS.cpp b/pcsx2/CDVD/IsoFS/IsoFS.cpp
index efb1259c9d..47c4906933 100644
--- a/pcsx2/CDVD/IsoFS/IsoFS.cpp
+++ b/pcsx2/CDVD/IsoFS/IsoFS.cpp
@@ -209,9 +209,10 @@ u32 IsoDirectory::GetFileSize( const wxString& filePath ) const
 
 IsoFileDescriptor::IsoFileDescriptor()
 {
-	lba = 0;
-	size = 0;
+	lba   = 0;
+	size  = 0;
 	flags = 0;
+	memset(&date, 0, sizeof(date));
 }
 
 IsoFileDescriptor::IsoFileDescriptor(const u8* data, int length)
diff --git a/pcsx2/DebugTools/DisR5900asm.cpp b/pcsx2/DebugTools/DisR5900asm.cpp
index 1d561700da..b887d306e0 100644
--- a/pcsx2/DebugTools/DisR5900asm.cpp
+++ b/pcsx2/DebugTools/DisR5900asm.cpp
@@ -869,6 +869,9 @@ void disMemAccess( std::string& output, const char* name, int cop = 0)
 	case 2:
 		rt = COP2_REG_FP[DECODE_FT];
 		break;
+	default:
+		rt = "???";
+		break;
 	}
 
 	const char* rs = GPR_REG[DECODE_RS];
diff --git a/pcsx2/DebugTools/DisassemblyManager.cpp b/pcsx2/DebugTools/DisassemblyManager.cpp
index 54b2d073d3..22b2612535 100644
--- a/pcsx2/DebugTools/DisassemblyManager.cpp
+++ b/pcsx2/DebugTools/DisassemblyManager.cpp
@@ -444,8 +444,10 @@ void DisassemblyFunction::generateBranchLines()
 	};
 
 	LaneInfo lanes[NUM_LANES];
-	for (int i = 0; i < NUM_LANES; i++)
+	for (int i = 0; i < NUM_LANES; i++) {
 		lanes[i].used = false;
+		lanes[i].end = 0;
+	}
 
 	u32 end = address+size;
 
diff --git a/pcsx2/DebugTools/ExpressionParser.cpp b/pcsx2/DebugTools/ExpressionParser.cpp
index b4c24ded18..4d757e872c 100644
--- a/pcsx2/DebugTools/ExpressionParser.cpp
+++ b/pcsx2/DebugTools/ExpressionParser.cpp
@@ -413,8 +413,8 @@ bool parsePostfixExpression(PostfixExpression& exp, IExpressionFunctions* funcs,
 	size_t num = 0;
 	u64 opcode;
 	std::vector<u64> valueStack;
-	u64 arg[5];
-	float fArg[5];
+	u64 arg[5] = {0};
+	float fArg[5] = {0};
 	bool useFloat = false;
 
 	while (num < exp.size())